[Full-disclosure] [ GLSA 200511-14 ] GTK+ 2, GdkPixbuf: Multiple XPM decoding vulnerabilities

From: Thierry Carrez (koon_at_gentoo.org)
Date: 11/16/05

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To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200511-14
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: GTK+ 2, GdkPixbuf: Multiple XPM decoding vulnerabilities
          Date: November 16, 2005
          Bugs: #112608
            ID: 200511-14

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    Synopsis
    ========

    The GdkPixbuf library, that is also included in GTK+ 2, contains
    vulnerabilities that could lead to a Denial of Service or the
    execution of arbitrary code.

    Background
    ==========

    GTK+ (the GIMP Toolkit) is a toolkit for creating graphical user
    interfaces. The GdkPixbuf library provides facilities for image
    handling. It is available as a standalone library and also packaged
    with GTK+ 2.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 x11-libs/gtk+ < 2.8.6-r1 >= 2.8.6-r1
                                                             *>= 2.6.10-r1
                                                                     < 2.0
      2 media-libs/gdk-pixbuf < 0.22.0-r5 >= 0.22.0-r5
        -------------------------------------------------------------------
         2 affected packages on all of their supported architectures.
        -------------------------------------------------------------------

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

    iDEFENSE reported a possible heap overflow in the XPM loader
    (CVE-2005-3186). Upon further inspection, Ludwig Nussel discovered two
    additional issues in the XPM processing functions : an integer overflow
    (CVE-2005-2976) that affects only gdk-pixbuf, and an infinite loop
    (CVE-2005-2975).

    Impact
    ======

    Using a specially crafted XPM image an attacker could cause an affected
    application to enter an infinite loop or trigger the overflows,
    potentially allowing the execution of arbitrary code.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All GTK+ 2 users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose x11-libs/gtk+

    All GdkPixbuf users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=media-libs/gdk-pixbuf-0.22.0-r5"

    References
    ==========

      [ 1 ] CVE-2005-2975
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2975
      [ 2 ] CVE-2005-2976
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2976
      [ 3 ] CVE-2005-3186
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3186
      [ 4 ] iDefense Security Advisory 11.15.05

    http://www.idefense.com/application/poi/display?id=339&type=vulnerabilities

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

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

      http://security.gentoo.org/glsa/glsa-200511-14.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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