Cisco Security Advisory – Cisco Unified Presence contains two denial of service (DoS) vulnerabilities that may cause an interruption to presence services. These vulnerabilities were discovered internally by Cisco, and there are no workarounds.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/82008/cisco-sa-20091014-cup.txt
Source: https://packetstormsecurity.com/files/82008/Cisco-Security-Advisory-20091014-cup.html