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Gentoo Linux Security Advisory                           GLSA 200509-07
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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
security@gentoo.org 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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