Secunia Security Advisory – The Madynes research team at INRIA Lorraine has reported some vulnerabilities in Cisco IP Phone 7940, which can be exploited by malicious people to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/58747/sa26547.txt
Source: https://packetstormsecurity.com/files/58747/Secunia-Security-Advisory-26547.html