[ GLSA 200409-12 ] ImageMagick, imlib, imlib2: BMP decoding buffer overflows

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200409-12
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: ImageMagick, imlib, imlib2: BMP decoding buffer overflows
      Date: September 08, 2004
      Bugs: #62309, #62487
        ID: 200409-12

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Synopsis
========

ImageMagick, imlib and imlib2 contain exploitable buffer overflow
vulnerabilities in the BMP image processing code.

Background
==========

ImageMagick is a suite of image manipulation utilities and libraries
used for a wide variety of image formats. imlib is a general image
loading and rendering library.

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

    -------------------------------------------------------------------
     Package                /   Vulnerable   /              Unaffected
    -------------------------------------------------------------------
  1  media-gfx/imagemagick       < 6.0.7.1                  >= 6.0.7.1
  2  media-libs/imlib           < 1.9.14-r2               >= 1.9.14-r2
  3  media-libs/imlib2            < 1.1.2                     >= 1.1.2
    -------------------------------------------------------------------
     3 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Due to improper bounds checking, ImageMagick and imlib are vulnerable
to a buffer overflow when decoding runlength-encoded bitmaps. This bug
can be exploited using a specially-crafted BMP image and could
potentially allow remote code execution when this image is decoded by
the user.

Impact
======

A specially-crafted runlength-encoded BMP could lead ImageMagick and
imlib to crash or potentially execute arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ImageMagick users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=media-gfx/imagemagick-6.0.7.1"
    # emerge ">=media-gfx/imagemagick-6.0.7.1"

All imlib users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=media-libs/imlib-1.9.14-r2"
    # emerge ">=media-libs/imlib-1.9.14-r2"

All imlib2 users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=media-libs/imlib2-1.1.2"
    # emerge ">=media-libs/imlib2-1.1.2"

References
==========

  [ 1 ] CAN-2004-0817
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0817
  [ 2 ] CAN-2004-0802
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0802
  [ 3 ] ImageMagick Mailing List

http://studio.imagemagick.org/pipermail/magick-developers/2004-August/002011.html
  [ 4 ] SecurityTracker #1011104
        http://securitytracker.com/alerts/2004/Aug/1011104.html
  [ 5 ] SecurityTracker #1011105
        http://securitytracker.com/alerts/2004/Aug/1011105.html

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

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

  http://security.gentoo.org/glsa/glsa-200409-12.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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