Cisco Security Advisory – A denial of service (DoS) vulnerability exists in the Cisco Session Border Controller (SBC) for the Cisco 7600 series routers. Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75418/cisco-sa-20090304-sbc.txt
Source: https://packetstormsecurity.com/files/75418/Cisco-Security-Advisory-20090304-sbc.html