Secunia Security Advisory – Some vulnerabilities have been reported in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/57823/sa26099.txt
Source: https://packetstormsecurity.com/files/57823/Secunia-Security-Advisory-26099.html