The Mu Security Research team has found that repro SIP proxy/registrar version 1.3.2 suffers from a remote denial of service vulnerability.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/68193/MU-200807-01.txt
Source: https://packetstormsecurity.com/files/68193/MU-Security-Advisory-2008-07.01.html