Cisco Security Advisory – Cisco Unified Communications Manager, formerly Cisco CallManager, contains multiple denial of service (DoS) vulnerabilities that may cause an interruption in voice services, if exploited. These vulnerabilities were discovered internally by Cisco.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/66410/cisco-sa-20080514-cucmdos.txt
Source: https://packetstormsecurity.com/files/66410/Cisco-Security-Advisory-20080514-cucmdos.html