A new security update has been released for Gentoo Linux - Asterisk: IAX2 video frame buffer overflow. Here the announcement:
Gentoo Linux Security Advisory GLSA 200606-15
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http://security.gentoo.org/
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Severity: High
Title: Asterisk: IAX2 video frame buffer overflow
Date: June 14, 2006
Bugs: #135680
ID: 200606-15
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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 / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/asterisk < 1.0.11_p1 >= 1.0.11_p1
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:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.0.11_p1"
References
==========
[ 1 ] CVE-2006-2898
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2898
[ 2 ] Corelabs Asterisk PBX truncated video frame vulnerability advisory
http://www.coresecurity.com/common/showdoc.php?idxT7&idxseccion
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200606-15.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
