[ GLSA 200404-20 ] Multiple vulnerabilities in xine

From: Joshua J. Berry (condordes_at_gentoo.org)
Date: 04/27/04

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    To: gentoo-announce@gentoo.org
Date: Mon, 26 Apr 2004 22:40:53 -0700

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    Gentoo Linux Security Advisory GLSA 200404-20
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: Multiple vulnerabilities in xine
          Date: April 27, 2004
          Bugs: #45448, #48107, #48108
            ID: 200404-20

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    Synopsis
    ========

    Several vulnerabilities have been found in xine-ui and xine-lib,
    potentially allowing an attacker to overwrite files with the rights of
    the user.

    Background
    ==========

    xine is a multimedia player allowing to play back CDs, DVDs, and VCDs
    and decoding multimedia files like AVI, MOV, WMV, and MP3 from local
    disk drives, and displays multimedia streamed over the Internet. It is
    available in Gentoo as a reusable library (xine-lib) with a standard
    user interface (xine-ui).

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 media-video/xine-ui <= 0.9.23-r1 >= 0.9.23-r2
      2 media-libs/xine-lib <= 1_rc3-r2 >= 1_rc3-r3
        -------------------------------------------------------------------
         2 affected packages on all of their supported architectures.
        -------------------------------------------------------------------

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

    Several vulnerabilities were found in xine-ui and xine-lib. By opening
    a malicious MRL in any xine-lib based media player, an attacker can
    write arbitrary content to an arbitrary file, only restricted by the
    permissions of the user running the application. By opening a malicious
    playlist in the xine-ui media player, an attacker can write arbitrary
    content to an arbitrary file, only restricted by the permissions of the
    user running xine-ui. Finally, a temporary file is created in an
    insecure manner by the xine-check and xine-bugreport scripts,
    potentially allowing a local attacker to use a symlink attack.

    Impact
    ======

    These three vulnerabilities may alow an attacker to corrupt system
    files, thus potentially leading to a Denial of Service. It is also
    theoretically possible, though very unlikely, to use these
    vulnerabilities to elevate the privileges of the attacker.

    Workaround
    ==========

    There is no known workaround at this time. All users are advised to
    upgrade to the latest available versions of xine-ui and xine-lib.

    Resolution
    ==========

    All users of xine-ui or another xine-based player should upgrade to the
    latest stable versions:

        # emerge sync

        # emerge -pv ">=media-video/xine-ui-0.9.23-r2"
        # emerge ">=media-video/xine-ui-0.9.23-r2"

        # emerge -pv ">=media-libs/xine-lib-1_rc3-r3"
        # emerge ">=media-libs/xine-lib-1_rc3-r3"

    References
    ==========

      [ 1 ] Xine Security Advisories
            http://xinehq.de/index.php/security
      [ 2 ] xine-bugreport and xine-check vulnerability
            http://nettwerked.mg2.org/advisories/xinebug

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

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

         http://security.gentoo.org/glsa/glsa-200404-20.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 Technologies, 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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