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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

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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