Secunia Security Advisory – Dino A. Dai Zovi has reported a weakness in Asterisk, which can be exploited by malicious people to hijack a user session.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/64704/sa29449.txt
Source: https://packetstormsecurity.com/files/64704/Secunia-Security-Advisory-29449.html