[ GLSA 200409-34 ] X.org, XFree86: Integer and stack overflows in libXpm

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200409-34
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                                            http://security.gentoo.org/
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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
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0687
  [ 4 ] 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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