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Gentoo Linux Security Advisory                           GLSA 200409-34
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  Severity: Normal
     Title: X.org, XFree86: Integer and stack overflows in libXpm
      Date: September 27, 2004
      Bugs: #64152
        ID: 200409-34

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Synopsis
========

libXpm, the X Pixmap library that is a part of the X Window System,
contains multiple stack and integer overflows that may allow a
carefully-crafted XPM file to crash applications linked against
libXpm, potentially allowing the execution of arbitrary code.

Background
==========

XFree86 and X.org are both implementations of the X Window System.

Affected packages
=================

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  x11-base/xorg-x11     < 6.7.0-r2                     *>= 6.7.0-r2
                            == 6.8.0                       >= 6.8.0-r1
  2  x11-base/xfree        < 4.3.0-r7                      >= 4.3.0-r7
    -------------------------------------------------------------------
     # Package 2 [x11-base/xfree] only applies to ALPHA and x86 users.

     NOTE: Any packages listed without architecture tags apply to all
           architectures...
    -------------------------------------------------------------------
     NOTE: Usage of XFree86 is deprecated on the AMD64, HPPA, IA64,
           MIPS, PPC and SPARC architectures: XFree86 users on those
           architectures should switch to X.org rather than upgrading
           XFree86.
    -------------------------------------------------------------------
     2 affected packages
    -------------------------------------------------------------------

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

Chris Evans has discovered multiple integer and stack overflow
vulnerabilities in the X Pixmap library, libXpm, which is a part of the
X Window System. These overflows can be exploited by the execution of a
malicious XPM file, which can crash applications that are dependent on
libXpm.

Impact
======

A carefully-crafted XPM file could crash applications that are linked
against libXpm, potentially allowing the execution of arbitrary code
with the privileges of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

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

    # emerge sync

    # emerge -pv ">=x11-base/xorg-x11-6.7.0-r2"
    # emerge ">=x11-base/xorg-x11-6.7.0-r2"

All XFree86 users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=x11-base/xfree-4.3.0-r7"
    # emerge ">=x11-base/xfree-4.3.0-r7"

Note: Usage of XFree86 is deprecated on the AMD64, HPPA, IA64, MIPS,
PPC and SPARC architectures: XFree86 users on those architectures
should switch to X.org rather than upgrading XFree86.

References
==========

  [ 1 ] X.org Security Advisory
        http://freedesktop.org/pipermail/xorg/2004-September/003196.html
  [ 2 ] X11R6.8.1 Release Notes
        http://freedesktop.org/pipermail/xorg/2004-September/003172.html
  [ 3 ] CAN-2004-0687
        CAN-2004-0687">http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0687
  [ 4 ] CAN-2004-0688
        CAN-2004-0688">http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0688

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

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

  http://security.gentoo.org/glsa/glsa-200409-34.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 2004 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/1.0


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