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