[ GLSA 200409-28 ] GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities

From: Thierry Carrez (koon_at_gentoo.org)
Date: 09/21/04

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    Gentoo Linux Security Advisory GLSA 200409-28
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities
          Date: September 21, 2004
          Bugs: #64230
            ID: 200409-28

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    Synopsis
    ========

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

    Background
    ==========

    GTK+ (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 as well as shipped
    with GTK+ 2.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 x11-libs/gtk+ < 2.4.9-r1 >= 2.4.9-r1
                                                                   < 2.0.0
      2 media-libs/gdk-pixbuf < 0.22.0-r3 >= 0.22.0-r3
        -------------------------------------------------------------------
         2 affected packages on all of their supported architectures.
        -------------------------------------------------------------------

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

    A vulnerability has been discovered in the BMP image preprocessor
    (CAN-2004-0753). Furthermore, Chris Evans found a possible integer
    overflow in the pixbuf_create_from_xpm() function, resulting in a heap
    overflow (CAN-2004-0782). He also found a potential stack-based buffer
    overflow in the xpm_extract_color() function (CAN-2004-0783). A
    possible integer overflow has also been found in the ICO decoder.

    Impact
    ======

    With a specially crafted BMP image an attacker could cause an affected
    application to enter an infinite loop when that image is being
    processed. Also, by making use of specially crafted XPM or ICO images
    an attacker could trigger the overflows, which potentially allows 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 -pv ">=x11-libs/gtk+-2.4.9-r1"
        # emerge ">=x11-libs/gtk+-2.4.9-r1"

    All GdkPixbuf users should upgrade to the latest version:

        # emerge sync

        # emerge -pv ">=media-libs/gdk-pixbuf-0.22.0-r3"
        # emerge ">=media-libs/gdk-pixbuf-0.22.0-r3"

    References
    ==========

      [ 1 ] CAN-2004-0753
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0753
      [ 2 ] CAN-2004-0782
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0782
      [ 3 ] CAN-2004-0783
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0783
      [ 4 ] CAN-2004-0788
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0788
      [ 5 ] GNOME Bug 150601
            http://bugzilla.gnome.org/show_bug.cgi?id=150601

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

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

      http://security.gentoo.org/glsa/glsa-200409-28.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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