Cisco IOS Software contains a vulnerability in the IP version 6 (IPv6) protocol stack implementation that could allow an unauthenticated, remote attacker to cause a reload of an affected device that has IPv6 operation enabled. The vulnerability is triggered when an affected device processes a malformed IPv6 packet.
Cisco has released software updates that address this vulnerability. There are no workarounds to mitigate this vulnerability.
This advisory is posted at http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20110928-ipv6["%5B%5BPublication_URL%5D%5D"].
Note: The September 28, 2011, Cisco IOS Software Security Advisory bundled publication includes ten Cisco Security Advisories. Nine of the advisories address vulnerabilities in Cisco IOS Software, and one advisory addresses a vulnerability in Cisco Unified Communications Manager. Each advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all vulnerabilities in the September 2011 Bundled Publication.
Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at the following link: