Cisco Security Advisory – Cisco Unified CallManager (CUCM) and Cisco Unified Presence Server (CUPS) contain multiple vulnerabilities which may result in the failure of CUCM or CUPS functionality, resulting in a Denial of Service (DoS) condition. There are no workarounds for these vulnerabilities. Cisco has made free software available to address these vulnerabilities for affected customers.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55460/cisco-sa-20070328-voip.txt
Source: https://packetstormsecurity.com/files/55460/Cisco-Security-Advisory-20070328-voip.html