Bug#631445: asterisk; AST-2011-009 - crash on malformed SIP packet

[Tzafrir Cohen]

Package: asterisk
Version: 1:1.8.4.2-1
Severity: grave
Tags: security upstream patch
Justification: user security hole

A remote user sending a SIP packet containing a Contact header with a
missing left angle bracket (<) causes Asterisk to access a null pointer.

This applies only to Asterisk 1.8 in Wheezy/Sid and not to the versions
in Squeeze and in Lenny.

For more information, see 
http://downloads.asterisk.org/pub/security/AST-2011-009.html