Cisco Security Advisory – Cisco Unified Communications Manager (formerly CallManager) contains multiple denial of service (DoS) vulnerabilities that if exploited could cause an interruption to voice services. The Session Initiation Protocol (SIP) and Skinny Client Control Protocol (SCCP) services are affected by these vulnerabilities.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/80662/cisco-sa-20090826-cucm.txt
Source: https://packetstormsecurity.com/files/80662/Cisco-Security-Advisory-20090826-cucm.html