Atstake Security Advisory A091304-2 – A vulnerability in the HTTP management interface of the Pingtel Xpressa phone enables a remote authenticated attack to cause the underlying VxWorks operating system to stop.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/34346/a091304-2.txt
Source: https://packetstormsecurity.com/files/34346/Atstake-Security-Advisory-04-09-13.2.html