Gentoo: 201402-10 PulseAudio: Insecure temporary file usage
Posted by Benjamin D. Thomas   
Gentoo An insecure temporary file usage has been reported in PulseAudio, possibly allowing symlink attacks.
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Gentoo Linux Security Advisory                           GLSA 201402-10
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: PulseAudio: Insecure temporary file usage
     Date: February 07, 2014
     Bugs: #313329
       ID: 201402-10

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Synopsis
========

An insecure temporary file usage has been reported in PulseAudio,
possibly allowing symlink attacks.

Background
==========

PulseAudio is a sound system for POSIX OSes.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-sound/pulseaudio       < 0.9.22                  >= 0.9.22 

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

The pa_make_secure_dir function in core-util.c does not handle
temporary files securely.

Impact
======

A local attacker could perform symlink attacks to overwrite arbitrary
files with the privileges of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PulseAudio users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-sound/pulseaudio-0.9.22"

References
==========

[ 1 ] CVE-2009-1299
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-1299

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

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

 http://security.gentoo.org/glsa/glsa-201402-10.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
https://bugs.gentoo.org.

License

Copyright 2014 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/2.5