Secunia Security Advisory – Some vulnerabilities have been reported in Asterisk, which potentially can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/56236/sa24977.txt
Source: https://packetstormsecurity.com/files/56236/Secunia-Security-Advisory-24977.html