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Home » Security Advisories» Gentoo » X.Org heap overflow in pixmap allocation

X.Org heap overflow in pixmap allocation

An integer overflow in pixmap memory allocation potentially allows any X.Org user to execute arbitrary code with elevated privileges.

  • Vendor: Gentoo
  • Vendor ID: GLSA 200509-07
  • Date: September 12, 2005


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Gentoo Linux Security Advisory GLSA 200509-07
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http://security.gentoo.org/
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Severity: High
Title: X.Org: Heap overflow in pixmap allocation
Date: September 12, 2005
Bugs: #105688
ID: 200509-07

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Synopsis
========

An integer overflow in pixmap memory allocation potentially allows any
X.Org user to execute arbitrary code with elevated privileges.

Background
==========

X.Org is X.Org Foundation's Public Implementation of the X Window
System.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 x11-base/xorg-x11 < 6.8.2-r3 >= 6.8.2-r3

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

X.Org is missing an integer overflow check during pixmap memory
allocation.

Impact
======

An X.Org user could exploit this issue to make the X server execute
arbitrary code with elevated privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All X.org users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-base/xorg-x11-6.8.2-r3"

References
==========

[ 1 ] CAN-2005-2495
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2495

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

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

http://security.gentoo.org/glsa/glsa-200509-07.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
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 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/2.0

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