Cisco IOS Software H.323 Denial of Service Vulnerabilities

The H.323 implementation in Cisco IOS®
Software contains two vulnerabilities that may be exploited remotely to cause a
denial of service (DoS) condition on a device that is running a vulnerable
version of Cisco IOS Software.

Cisco has released software updates that address these vulnerabilities. There are no workarounds to mitigate these vulnerabilities
other than disabling H.323 on the vulnerable device.

This advisory is posted at
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-h323[“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100922-h323”].

Note: The September 22, 2010, Cisco IOS Software Security Advisory bundled
publication includes six Cisco Security Advisories. Five of the advisories
address vulnerabilities in Cisco IOS Software, and one advisory addresses
vulnerabilities in Cisco Unified Communications Manager. Each advisory lists
the releases that correct the vulnerability or vulnerabilities detailed in the
advisory. The table at the following URL lists releases that correct all Cisco
IOS Software vulnerabilities that have been published on September 22, 2010, or
earlier:

http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a315.shtml[“http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a315.shtml”]

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

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep10.html[“http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep10.html”]