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Gentoo: Berkeley MPEG Tools Multiple insecure temporary Print E-mail
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Posted by Benjamin D. Thomas   
Gentoo The Berkeley MPEG Tools use temporary files in various insecure ways, potentially allowing a local user to overwrite arbitrary files.
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Gentoo Linux Security Advisory                           GLSA 200510-02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Berkeley MPEG Tools: Multiple insecure temporary files
      Date: October 03, 2005
      Bugs: #107344
        ID: 200510-02

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Synopsis
========

The Berkeley MPEG Tools use temporary files in various insecure ways,
potentially allowing a local user to overwrite arbitrary files.

Background
==========

The Berkeley MPEG Tools are a collection of utilities for manipulating
MPEG video technology, including an encoder (mpeg_encode) and various
conversion utilities.

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

    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  media-video/mpeg-tools      < 1.5b-r2                  >= 1.5b-r2

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

Mike Frysinger of the Gentoo Security Team discovered that mpeg_encode
and the conversion utilities were creating temporary files with
predictable or fixed filenames. The 'test' make target of the MPEG
Tools also relied on several temporary files created insecurely.

Impact
======

A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
the utilities are executed (or 'make test' is run), this would result
in the file being overwritten with the rights of the user running the
command.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Berkeley MPEG Tools users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-video/mpeg-tools-1.5b-r2"

References
==========

  [ 1 ] CAN-2005-3115
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3115

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

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

  http://security.gentoo.org/glsa/glsa-200510-02.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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