[AusNOG] Cisco Security Advisory: Cisco IOS and IOS XE Software AAA Login Denial of Service Vulnerability

Cisco Systems Product Security Incident Response Team psirt at cisco.com
Thu Sep 29 02:22:27 EST 2016


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Cisco Security Advisory: Cisco IOS and IOS XE Software AAA Login Denial of Service Vulnerability

Advisory ID:  cisco-sa-20160928-aaados

Revision: 1.0

For Public Release: 2016 September 28 16:00  GMT

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

Summary
=======

A vulnerability in the Authentication, Authorization, and Accounting (AAA) service for remote Secure Shell Host (SSH) connections to the device for Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause the vulnerable device to reload.

The vulnerability is due to an error log message when a remote SSH connection to the device fails AAA authentication. An attacker could exploit this vulnerability by attempting to authenticate to the targeted device. An exploit could allow the attacker to cause a denial of service (DoS) condition.

Cisco has released software updates that address this vulnerability. There is a workaround that addresses this vulnerability.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-aaados

This advisory is part of the September 28, 2016, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 10 Cisco Security Advisories that describe 11 vulnerabilities. All the vulnerabilities have a Security Impact Rating of High. For a complete list of the advisories and links to them, see Cisco Event Response: September 2016 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.

-----BEGIN PGP SIGNATURE-----
Comment: GPGTools - http://gpgtools.org
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=NlPr
-----END PGP SIGNATURE-----


More information about the AusNOG mailing list