[AusNOG] Cisco Security Advisory: Cisco IOS Software Tunnels Vulnerability

Cisco Systems Product Security Incident Response Team psirt at cisco.com
Thu Sep 24 02:15:00 EST 2009


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Cisco Security Advisory: Cisco IOS Software Tunnels Vulnerability

Advisory ID: cisco-sa-20090923-tunnels

Revision 1.0

For Public Release 2009 September 23

+---------------------------------------------------------------------

Summary
=======

Cisco devices running affected versions of Cisco IOS Software are
vulnerable to a denial of service (DoS) attack if configured for IP
tunnels and Cisco Express Forwarding.

Cisco has released free software updates that address this
vulnerability.

This advisory is posted at:

http://www.cisco.com/warp/public/707/cisco-sa-20090923-tunnels.shtml

Note: The September 23, 2009, Cisco IOS Security Advisory bundled
publication includes eleven Security Advisories. Ten of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each advisory lists the releases that correct the
vulnerability or vulnerabilities detailed in the advisory. The
following table lists releases that correct all Cisco IOS Software
vulnerabilities that have been published on September 23, 2009, or
earlier.

http://www.cisco.com/warp/public/707/cisco-sa-20090923-bundle.shtml

Individual publication links are in "Cisco Event Response: Semiannual
Cisco IOS Software Advisory Bundled Publication" at the following
link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html

Affected Products
=================

Cisco devices are vulnerable when running an affected version of
Cisco IOS Software and configured for Generic Routing Encapsulation
(GRE), IPinIP, Generic Packet Tunneling in IPv6 or IPv6 over IP
tunnels with Cisco Express Forwarding enabled. The Cisco IOS Point to
Point Tunneling Protocol (PPTP) feature creates GRE tunnels that are
transparent to the user. Therefore systems configured for PPTP are
also vulnerable.

The Cisco multicast Virtual Private Network (MVPN) feature also
creates GRE tunnels that are transparent to the user, however MVPN
configurations are not vulnerable, unless there are other tunnels
that are configured explicitly.

Vulnerable Products
+------------------

A Cisco IOS device that is explicitly configured for a tunnel will
have a configuration similar to the following in the output of "show
running-config":

    interface tunnel0
     ip address [IP-address]
     tunnel source [Tunnel-Source]
     tunnel destination [Tunnel Destination]
    

An alternative method to identify devices that are configured for
tunnels is to use the "show interfaces" command. A sample output is
provided below:

    Router#show interfaces | include Tunnel
    Tunnel0 is up, line protocol is down
      Hardware is Tunnel
      [...]
      Tunnel protocol/transport GRE/IP
    
    !-- output truncated
    

A Cisco IOS device that is configured for Cisco Express Forwarding
will display the forwarding table in the output of "show ip cef"
output, as in the following example:

    Router#show ip cef
    Prefix              Next Hop             Interface
    0.0.0.0/0           10.48.64.1           Ethernet0/0
    0.0.0.0/32          receive
    ....

Cisco Express Forwarding is enabled by default in most Cisco IOS
Software versions.

To determine the Cisco IOS Software release that is running on a
Cisco product, administrators can log in to the device and issue the 
"show version" command to display the system banner. The system banner
confirms that the device is running Cisco IOS Software by displaying
text similar to "Cisco Internetwork Operating System Software" or
"Cisco IOS Software." The image name displays in parentheses,
followed by "Version" and the Cisco IOS Software release name. Other
Cisco devices do not have the "show version" command or may provide
different output.

The following example identifies a Cisco 7200 series device running
Cisco IOS Software release 12.3(19) with an installed image name of
C7200-JS-M:

    7200#show version 
    Cisco Internetwork Operating System Software 
    IOS (tm) 7200 Software (C7200-JS-M), Version 12.3(19), RELEASE SOFTWARE (fc2)
    Technical Support: http://www.cisco.com/techsupport
    Copyright (c) 1986-2006 by cisco Systems, Inc.
    Compiled Thu 11-May-06 22:37 by evmiller
    
    !-- output truncated
    

The following example identifies a Cisco 7300 series device running
Cisco IOS Software release 12.3(22) with an installed image name of
C7301-P-M:

    7301# show version 
    Cisco Internetwork Operating System Software 
    IOS (tm) 7301 Software (C7301-P-M), Version 12.3(22), RELEASE SOFTWARE (fc2)
    Technical Support: http://www.cisco.com/techsupport
    Copyright (c) 1986-2007 by cisco Systems, Inc.
    Compiled Wed 24-Jan-07 20:26 by ccai
    
    !-- output truncated
    

Additional information about Cisco IOS Software release naming
conventions is available in "White Paper: Cisco IOS Reference Guide"
at the following link:

http://www.cisco.com/warp/public/620/1.html

Products Confirmed Not Vulnerable
+--------------------------------

Cisco IOS XR Software is not affected.

Cisco IOS XE Software is not affected.

IPsec and Dynamic Multipoint VPN (DMVPN) configurations that are
protected by IPsec are not affected.

MVPN configurations are not affected.

Multiprotocol Label Switching (MPLS) Traffic Engineering (TE) tunnels
are not affected.

No other Cisco products are currently known to be affected by these
vulnerabilities.

Details
=======

A tunnel protocol encapsulates a wide variety of protocol packet
types inside IP tunnels, creating a virtual point-to-point link
between internetworking devices over an IP network.

Cisco Express Forwarding is a Layer 3 IP switching technology. It
improves network performance and scalability for networks with high
and dynamic traffic patterns.

Devices that are running Cisco IOS Software and configured for GRE,
IPinIP, Generic Packet Tunneling in IPv6 or IPv6 over IP tunnels
tunnels and Cisco Express Forwarding may reload upon switching a
specially crafted malformed packets. Please note that using PPTP
creates GRE tunnels that are transparent to the end user so devices
configured for PPTP are vulnerable if they are configured on an
affected software version. Using MVPN also creates GRE tunnels that
are transparent to the end user. However MVPN configurations are not
vulnerable.

These vulnerabilities are addressed by the Cisco Bug IDs CSCsh97579,
CSCsq31776 and CSCsx70889 and have been assigned
Common Vulnerabilities and Exposures (CVE) IDs CVE-2009-2872 and
CVE-2009-2873.

Vulnerability Scoring Details
=============================

Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding
CVSS at:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:

http://intellishield.cisco.com/security/alertmanager/cvss

CSCsh97579 - switching bad packet tunnel to tunnel crashes router

CVSS Base Score - 7.1

Access Vector           - Network
Access Complexity       - Medium
Authentication          - None
Confidentiality Impact  - None
Integrity Impact        - None
Availability Impact     - Complete

CVSS Temporal Score - 5.9

Exploitability          - Functional
Remediation Level       - Official-Fix
Report Confidence       - Confirmed

CSCsq31776 - ip tunnels regression test can crash the router

CVSS Base Score - 7.1

Access Vector           - Network
Access Complexity       - Medium
Authentication          - None
Confidentiality Impact  - None
Integrity Impact        - None
Availability Impact     - Complete

CVSS Temporal Score - 5.9

Exploitability          - Functional
Remediation Level       - Official-Fix
Report Confidence       - Confirmed

CSCsx70889 - Systems configured for tunnels reload after receiving malformed packets

CVSS Base Score - 7.1

Access Vector           - Network
Access Complexity       - Medium
Authentication          - None
Confidentiality Impact  - None
Integrity Impact        - None
Availability Impact     - Complete

CVSS Temporal Score - 5.9

Exploitability          - Functional
Remediation Level       - Official-Fix
Report Confidence       - Confirmed

Impact
======

Successful exploitation of the vulnerability may result in the reload
of an affected system, causing a DoS condition.

Software Versions and Fixes
===========================

When considering software upgrades, also consult:

http://www.cisco.com/go/psirt

and any subsequent advisories to determine exposure and a complete
upgrade solution.

In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.

Each row of the Cisco IOS software table (below) names a Cisco IOS
release train. If a given release train is vulnerable, then the
earliest possible releases that contain the fix (along with the
anticipated date of availability for each, if applicable) are listed
in the "First Fixed Release" column of the table. The "Recommended
Release" column indicates the releases which have fixes for all the
published vulnerabilities at the time of this Advisory. A device
running a release in the given train that is earlier than the release
in a specific column (less than the First Fixed Release) is known to
be vulnerable. Cisco recommends upgrading to a release equal to or
later than the release in the "Recommended Releases" column of the
table.

+-------------------------------------------------------------------+
|   Major    |          Availability of Repaired Releases           |
|  Release   |                                                      |
|------------+------------------------------------------------------|
|  Affected  |                                      |  Recommended  |
| 12.0-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0DA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.0DB     |                                      |               |
|            | Releases up to and including 12.0(1) | 12.4(23b)     |
|            | DB are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0DC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | 12.0(32)S14; Available on            | 12.0(33)S5    |
|            | 25-SEP-2009                          |               |
| 12.0S      |                                      | 12.0(32)S14;  |
|            | 12.0(33)S5                           | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.0(33)S5    |
|            |                                      |               |
| 12.0SC     | Vulnerable; first fixed in 12.0S     | 12.0(32)S14;  |
|            |                                      | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.0(33)S5    |
|            |                                      |               |
| 12.0SL     | Vulnerable; first fixed in 12.0S     | 12.0(32)S14;  |
|            |                                      | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0SP     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.0(33)S5    |
|            |                                      |               |
| 12.0ST     | Vulnerable; first fixed in 12.0S     | 12.0(32)S14;  |
|            |                                      | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.0(33)S5    |
|            |                                      |               |
| 12.0SX     | Vulnerable; first fixed in 12.0S     | 12.0(32)S14;  |
|            |                                      | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            | 12.0(32)SY9a                         | 12.0(32)SY9a  |
|            |                                      |               |
| 12.0SY     | 12.0(32)SY10; Available on           | 12.0(32)SY10; |
|            | 25-SEP-2009                          | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.0(33)S5    |
|            |                                      |               |
| 12.0SZ     | Vulnerable; first fixed in 12.0S     | 12.0(32)S14;  |
|            |                                      | Available on  |
|            |                                      | 25-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.0W      |                                      |               |
|            | Releases up to and including 12.0    | 12.4(23b)     |
|            | (16)W5(21c) are not vulnerable.      |               |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.0(5)WC3b are    |               |
| 12.0WC     | vulnerable, release 12.0(5)WC3b and  |               |
|            | later are not vulnerable             |               |
|------------+--------------------------------------+---------------|
| 12.0WT     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
| 12.0XF     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.0(4)XI2 are     | 12.4(25b)     |
| 12.0XI     | vulnerable, release 12.0(4)XI2 and   |               |
|            | later are not vulnerable; first      | 12.4(23b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XJ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XL     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XN     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XQ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.0XR     |                                      |               |
|            | Releases up to and including 12.0(6) | 12.4(23b)     |
|            | XR are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.0XS     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XT     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.0XV     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.1-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1AA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.1AX     | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.1    | 12.2(50)SE3   |
|            | (13)AY are not vulnerable.           |               |
| 12.1AY     |                                      | 12.2(52)SE;   |
|            | Releases 12.1(22)AY1 and later are   | Available on  |
|            | not vulnerable; first fixed in       | 13-OCT-2009   |
|            | 12.2SE                               |               |
|------------+--------------------------------------+---------------|
| 12.1AZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1CX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1DA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1DB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1DC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.1E      | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.1(4) |               |
|            | EA1c are not vulnerable.             |               |
| 12.1EA     |                                      | 12.2(50)SE3   |
|            | Releases 12.1(22)EA11 and later are  |               |
|            | not vulnerable; first fixed in       |               |
|            | 12.2SE                               |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.1EB     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(33)SCB4  |
| 12.1EC     | Vulnerable; first fixed in 12.3BC    |               |
|            |                                      | 12.3(21a)BC9  |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.1EO     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SGA11 |
| 12.1EU     | Vulnerable; first fixed in 12.2SG    |               |
|            |                                      | 12.2(50)SG4   |
|------------+--------------------------------------+---------------|
| 12.1EV     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1EW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1EX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
| 12.1EY     | Releases up to and including 12.1(1) |               |
|            | EY are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1EZ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1GA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1GB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XF     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XI     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XJ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XL     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XP     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XQ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XR     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.1XS     |                                      |               |
|            | Releases up to and including 12.1(1) | 12.4(23b)     |
|            | XS are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XT     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XU     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XV     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.1XY     |                                      |               |
|            | Releases up to and including 12.1(4) | 12.4(23b)     |
|            | XY are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1XZ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1YA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1YB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1YC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1YD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.1(5)YE6 are     | 12.4(25b)     |
| 12.1YE     | vulnerable, release 12.1(5)YE6 and   |               |
|            | later are not vulnerable; first      | 12.4(23b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1YF     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.1YH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.1YI     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.1YJ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.2-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2B      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2BC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2BW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2BX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2BY     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2BZ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2CX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2CY     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.2CZ     | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2DA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2DD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2DX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SGA11 |
| 12.2EW     | Vulnerable; first fixed in 12.2SG    |               |
|            |                                      | 12.2(50)SG4   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SGA11 |
| 12.2EWA    | Vulnerable; first fixed in 12.2SG    |               |
|            |                                      | 12.2(50)SG4   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2EX     | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(46)EY are     | 12.2(50)SE3   |
|            | vulnerable, release 12.2(46)EY and   |               |
| 12.2EY     | later are not vulnerable; first      | 12.2(52)SE;   |
|            | fixed in 12.2SE                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2EZ     | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.2FX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2FY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2FZ     | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.2IRA    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
| 12.2IRB    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IRC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXB    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXD    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXE    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXF    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXG    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXH    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2JA     | Releases up to and including 12.2    |               |
|            | (13)JA4 are not vulnerable.          |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2JK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2MB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2MC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.2S      | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
|            | 12.2(31)SB16                         |               |
|            |                                      |               |
| 12.2SB     | 12.2(33)SB6                          | 12.2(33)SB7   |
|            |                                      |               |
|            | 12.2(28)SB14; Available on           |               |
|            | 20-OCT-2009                          |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.2SBC    | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
| 12.2SCA    | Vulnerable; first fixed in 12.2SCB   | 12.2(33)SCB4  |
|------------+--------------------------------------+---------------|
| 12.2SCB    | 12.2(33)SCB4                         | 12.2(33)SCB4  |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            | 12.2(50)SE2                          |               |
| 12.2SE     |                                      | 12.2(52)SE;   |
|            | 12.2(52)SE; Available on 13-OCT-2009 | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SEA    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SEB    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SEC    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SED    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SEE    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(25)SEF2 are   | 12.2(50)SE3   |
|            | vulnerable, release 12.2(25)SEF2 and |               |
| 12.2SEF    | later are not vulnerable; first      | 12.2(52)SE;   |
|            | fixed in 12.2SE                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(25)SEG4 are   | 12.2(50)SE3   |
|            | vulnerable, release 12.2(25)SEG4 and |               |
| 12.2SEG    | later are not vulnerable; first      | 12.2(52)SE;   |
|            | fixed in 12.2SE                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | 12.2(50)SG4                          |               |
| 12.2SG     |                                      | 12.2(50)SG4   |
|            | 12.2(53)SG                           |               |
|------------+--------------------------------------+---------------|
| 12.2SGA    | 12.2(31)SGA11                        | 12.2(31)SGA11 |
|------------+--------------------------------------+---------------|
| 12.2SL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SM     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SO     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SQ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2SRA    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
| 12.2SRB    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
| 12.2SRC    | 12.2(33)SRC5; Available on           | 12.2(33)SRD3  |
|            | 29-OCT-2009                          |               |
|------------+--------------------------------------+---------------|
| 12.2SRD    | 12.2(33)SRD2                         | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2STE    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2SU     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SV     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SVA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SVC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SVD    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SVE    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.2SW     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.2SX     | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.2SXA    | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.2SXB    | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.2SXD    | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.2SXE    | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            | 12.2(18)SXF17; Available on          | 12.2(18)      |
|            | 30-SEP-2009                          | SXF17;        |
| 12.2SXF    |                                      | Available on  |
|            | Please see IOS Software Modularity   | 30-SEP-2009   |
|            | Patch                                |               |
|------------+--------------------------------------+---------------|
|            | 12.2(33)SXH6; Available on           |               |
|            | 30-OCT-2009                          | 12.2(33)SXH6; |
| 12.2SXH    |                                      | Available on  |
|            | Please see IOS Software Modularity   | 30-OCT-2009   |
|            | Patch                                |               |
|------------+--------------------------------------+---------------|
| 12.2SXI    | 12.2(33)SXI2                         | 12.2(33)SXI2a |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.2SY     | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.2SZ     | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2TPC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.2XA     |                                      |               |
|            | Releases up to and including 12.2(1) | 12.4(23b)     |
|            | XA are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XB     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XF     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XI     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XJ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XL     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
| 12.2XNA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XNB    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XNC    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XND    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SGA11 |
| 12.2XO     | Vulnerable; first fixed in 12.2SG    |               |
|            |                                      | 12.2(50)SG4   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XQ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XR     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XS     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XT     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XU     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XV     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2XW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2YA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YB     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YC     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YD     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YE     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YF     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YG     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YH     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YJ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YK     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2YM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YN     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YO     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(25b)     |
| 12.2YP     |                                      |               |
|            | Releases up to and including 12.2(8) | 12.4(23b)     |
|            | YP are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YQ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YR     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YS     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YT     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YU     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YV     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YW     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YX     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YY     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YZ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(18)      |
| 12.2ZA     | Vulnerable; first fixed in 12.2SXF   | SXF17;        |
|            |                                      | Available on  |
|            |                                      | 30-SEP-2009   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZB     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZC     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZD     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2ZE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2ZF     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2ZG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.2ZH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZJ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZP     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(33)SXH6; |
| 12.2ZU     | Vulnerable; first fixed in 12.2SXH   | Available on  |
|            |                                      | 30-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.2ZX     | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZY     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2ZYA    | 12.2(18)ZYA2                         |               |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.3-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3B      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
| 12.3BC     | 12.3(21a)BC9                         | 12.3(21a)BC9  |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3BW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
| 12.3EU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3JA     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3JEA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3JEB    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3JEC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3JK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3JL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.3JX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3TPC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3VA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3XB     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3XF     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SB16  |
| 12.3XI     | Vulnerable; first fixed in 12.2SB    |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)XR7   |
| 12.3XJ     | Vulnerable; first fixed in 12.4XR    |               |
|            |                                      | 12.4(22)XR    |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
|            |                                      | 12.4(22)T3    |
| 12.3XL     | Vulnerable; first fixed in 12.4T     |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XQ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XR     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XS     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3XU     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)XR7   |
| 12.3XW     | Vulnerable; first fixed in 12.4XR    |               |
|            |                                      | 12.4(22)XR    |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XY     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3XZ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(25b)     |
| 12.3YA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(23b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YD     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)XR7   |
| 12.3YF     | Vulnerable; first fixed in 12.4XR    |               |
|            |                                      | 12.4(22)XR    |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YG     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YH     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YI     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YJ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YK     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YM     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YQ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YS     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YT     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YU     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)XR7   |
| 12.3YX     | Vulnerable; first fixed in 12.4XR    |               |
|            |                                      | 12.4(22)XR    |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3YZ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3ZA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.4-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            | 12.4(23b)                            | 12.4(25b)     |
| 12.4       |                                      |               |
|            | 12.4(25b)                            | 12.4(23b)     |
|------------+--------------------------------------+---------------|
| 12.4GC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JA     | 12.4(13d)JA                          |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JDA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JDC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JDD    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JK     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JMA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4JMB    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.4JX     | Vulnerable; first fixed in 12.4JA    |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(11)MD9   |
|            |                                      |               |
| 12.4MD     | 12.4(11)MD9                          | 12.4(15)MD3   |
|            |                                      |               |
|            |                                      | 12.4(22)MD1   |
|------------+--------------------------------------+---------------|
| 12.4MDA    | 12.4(22)MDA1                         | 12.4(22)MDA1  |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.4(19)MR3 are    |               |
| 12.4MR     | vulnerable, release 12.4(19)MR3 and  | 12.4(19)MR3   |
|            | later are not vulnerable             |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4SW     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            | 12.4(15)T10                          |               |
|            |                                      | 12.4(20)T4    |
|            | 12.4(20)T4                           |               |
| 12.4T      |                                      | 12.4(22)T3    |
|            | 12.4(22)T2                           |               |
|            |                                      | 12.4(24)T2;   |
|            | 12.4(24)T2;Available on 23-OCT-2009  | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XB     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XC     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XD     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XE     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XF     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XG     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XJ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XK     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4XL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XM     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4XN     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4XP     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XQ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | 12.4(22)XR                           | 12.4(15)XR7   |
| 12.4XR     |                                      |               |
|            | 12.4(15)XR6                          | 12.4(22)XR    |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XT     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4XV     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XW     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XY     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XZ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4YA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.4YB     | 12.4(22)YB4                          | 12.4(22)YB4   |
|------------+--------------------------------------+---------------|
| 12.4YD     | 12.4(22)YD1                          | 12.4(22)YD1   |
|------------+--------------------------------------+---------------|
| 12.4YE     | 12.4(22)YE1                          | 12.4(22)YE1   |
+-------------------------------------------------------------------+

Cisco IOS Software Modularity - Maintenance Packs
+------------------------------------------------

Customers who are using Cisco IOS Software Modularity can apply the
respective maintenance packs. More information on Cisco IOS Software
Modularity can be found at the following link:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_bulletin0900aecd80313e15.html

The Maintenance Packs listed below can be downloaded at:

http://www.cisco.com/go/pn

Cisco IOS Software Modularity Maintenance Pack for 12.2SXF
+---------------------------------------------------------

+-------------------------------------------------------------------+
|  Cisco IOS Software Release   |   Solution Maintenance Pack(MP)   |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF11                 | MP002                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF13                 | MP001                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF14                 | MP001                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF15                 | MP001                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF16                 | MP001                             |
+-------------------------------------------------------------------+

Cisco IOS Software Modularity Maintenance Pack for 12.2SXH

+-------------------------------------------------------------------+
|  Cisco IOS Software Release   |   Solution Maintenance Pack(MP)   |
|-------------------------------+-----------------------------------|
| 12.2(33)SXH3                  | MP003                             |
|-------------------------------+-----------------------------------|
| 12.2(33)SXH4                  | MP002                             |
|-------------------------------+-----------------------------------|
| 12.2(33)SXH5                  | MP001                             |
+-------------------------------------------------------------------+

Workarounds
===========

Disabling Cisco Express Forwarding will mitigate this vulnerability.
It can be disabled in two ways:

Disabling Cisco Express Forwarding Globally
+------------------------------------------

Cisco Express Forwarding can be globally disabled by using the "no ip
cef" global configuration command.

Disabling Cisco Express Forwarding on Tunnel Interfaces
+------------------------------------------------------

Cisco Express Forwarding can also be disabled on individual tunnel
interfaces. To be effective, it must be disabled on all tunnel
interfaces configured on an affected device. Cisco Express Forwarding
can be disabled on individual interfaces as shown in the following
example:

    interface Tunnel [interface-ID]
      no ip route-cache cef

Note: Disabling Cisco Express Forwarding may have significant
performance impact and is not recommended.

Additional mitigations that can be deployed on Cisco devices in the
network are available in the Cisco Applied Mitigation Bulletin
companion document for this advisory, which is available at the
following link:

http://www.cisco.com/warp/public/707/cisco-amb-20090923-tunnels.shtml

Obtaining Fixed Software
========================

Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:

http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html

or as otherwise set forth at Cisco.com Downloads at:

http://www.cisco.com/public/sw-center/sw-usingswc.shtml

Do not contact psirt at cisco.com or security-alert at cisco.com for
software upgrades.

Customers with Service Contracts
+-------------------------------

Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.

Customers using Third Party Support Organizations
+------------------------------------------------

Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.

Customers without Service Contracts
+----------------------------------

Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.

  * +1 800 553 2447 (toll free from within North America)
  * +1 408 526 7209 (toll call from anywhere in the world)
  * e-mail: tac at cisco.com

Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.

Refer to:

http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.

Exploitation and Public Announcements
=====================================

The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.

This vulnerability was found internally.

Status of this Notice: FINAL
============================

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.

Distribution
============

This advisory is posted on Cisco's worldwide website at:

http://www.cisco.com/warp/public/707/cisco-sa-20090923-tunnels.shtml

In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.

  * cust-security-announce at cisco.com
  * first-bulletins at lists.first.org
  * bugtraq at securityfocus.com
  * vulnwatch at vulnwatch.org
  * cisco at spot.colorado.edu
  * cisco-nsp at puck.nether.net
  * full-disclosure at lists.grok.org.uk
  * comp.dcom.sys.cisco at newsgate.cisco.com

Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.

Revision History
================

+---------------------------------------+
| Revision |              | Initial     |
| 1.0      | 2009-Sept-23 | public      |
|          |              | release     |
+---------------------------------------+

Cisco Security Procedures
=========================

Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:

http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html

This includes instructions for press inquiries regarding Cisco security
notices. All Cisco security advisories are available at:

http://www.cisco.com/go/psirt
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