[ GLSA 200606-15 ] Asterisk: IAX2 video frame buffer overflow

[GLSA]

Gentoo Linux Security Advisory

Title: Asterisk: IAX2 video frame buffer overflow (GLSA 200606-15)
Severity: high
Exploitable: remote
Date: June 14, 2006
Bug(s): #135680
ID: 200606-15

Synopsis

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

Background

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

Affected Packages

Package: net-misc/asterisk
Vulnerable: < 1.0.11_p1
Unaffected: >= 1.0.11_p1
Architectures: All supported architectures


Description

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

Impact

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.

Workaround

Disable public IAX2 support.

Resolution

All Asterisk users should upgrade to the latest version: