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Cisco IOS Software DHCP Version 6 Server Denial of Service Vulnerability

Advisory ID: cisco-sa-20120926-dhcpv6

Revision 1.0

For Public Release 2012 September 26 16:00  UTC (GMT)
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Summary
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Cisco IOS Software and Cisco IOS XE Software contain a vulnerability
that could allow an unauthenticated, remote attacker to cause a denial
of service (DoS) condition. An attacker could exploit this
vulnerability by sending a crafted request to an affected device that
has the DHCP version 6 (DHCPv6) server feature enabled, causing a
reload.

Cisco has released free software updates that address this
vulnerability.  This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-dhcpv6

Note: The September 26, 2012, Cisco IOS Software Security Advisory
bundled publication includes 9 Cisco Security Advisories. Eight of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each Cisco IOS Software Security 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 Cisco IOS Software vulnerabilities in the September
2012 bundled publication.

Individual publication links are in "Cisco Event Response: Semi-Annual
Cisco IOS Software Security Advisory Bundled Publication" at the
following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep12.html

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