Cisco Security Advisory – Cisco Unified Presence contains two denial of service (DoS) vulnerabilities that affect the processing of Session Initiation Protocol (SIP) messages. Exploitation of these vulnerabilities could cause an interruption of presence services. suffers from a denial of service vulnerability.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/93158/cisco-sa-20100825-cup.txt
Source: https://packetstormsecurity.com/files/93158/Cisco-Security-Advisory-20100825-cup.html