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Asterisk: IAX2 video frame buffer overflow


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200606-15 / asterisk
Release Date June 14, 2006
Latest Revision June 14, 2006: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/asterisk < 1.0.11_p1 >= 1.0.11_p1 All supported architectures

Related bugreports: #135680


Asterisk contains a bug in the IAX2 channel driver making it vulnerable to the remote execution of arbitrary code.

2.  Impact Information


Asterisk is an open source implementation of a telephone private branch exchange (PBX).


Asterisk fails to properly check the length of truncated video frames in the IAX2 channel driver which results in a buffer overflow.


An attacker could exploit this vulnerability by sending a specially crafted IAX2 video stream resulting in the execution of arbitrary code with the permissions of the user running Asterisk.

3.  Resolution Information


Disable public IAX2 support.


All Asterisk users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.0.11_p1"

4.  References


Page updated June 14, 2006

Summary: This is a Gentoo Linux Security Advisory

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