A new security update has been released for Gentoo Linux - X.Org X server: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200701-25
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http://security.gentoo.org/
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Severity: Normal
Title: X.Org X server: Multiple vulnerabilities
Date: January 27, 2007
Bugs: #157421
ID: 200701-25

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Synopsis
========

Sean Larsson from iDefense Labs has found multiple vulnerabilities in
the DBE and Render extensions.

Background
==========

The X Window System is a graphical windowing system based on a
client/server model.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 x11-base/xorg-server < 1.1.1-r4 >= 1.1.1-r4

Description
===========

Multiple memory corruption vulnerabilities have been found in the
ProcDbeGetVisualInfo() and the ProcDbeSwapBuffers() of the DBE
extension, and ProcRenderAddGlyphs() in the Render extension.

Impact
======

A local attacker could execute arbitrary code with the privileges of
the user running the X server, typically root.

Workaround
==========

Disable the dbe and render extension by removing the "Load dbe" and
"Load render" directives in the Module section of xorg.conf.

Note: This could affect the functionality of some applications.

Resolution
==========

All X.Org X server users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.1.1-r4=
"

References
==========

[ 1 ] CVE-2006-6101
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6101
[ 2 ] CVE-2006-6102
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6102
[ 3 ] CVE-2006-6103
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6103

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200701-25.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 2007 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