Gentoo Linux Security Advisory GLSA 200703-14 – The MU Security Research Team discovered that Asterisk contains a NULL-pointer dereferencing error in the SIP channel when handling request messages. Versions less than 1.2.14-r1 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55210/glsa-200703-14.txt
Source: https://packetstormsecurity.com/files/55210/Gentoo-Linux-Security-Advisory-200703-14.html