full-disclosure - [ GLSA 200704-22 ] BEAST: Denial of Service

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Message-ID: <20070427203526.GC12894@falco.falcal.net>
Date: Fri, 27 Apr 2007 22:35:26 +0200
From: Raphael Marichez <falco@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200704-22 ] BEAST: Denial of Service

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Gentoo Linux Security Advisory                           GLSA 200704-22
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: BEAST: Denial of Service
      Date: April 27, 2007
      Bugs: #163146
        ID: 200704-22

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Synopsis
========

A vulnerability has been discovered in BEAST allowing for a Denial of
Service.

Background
==========

BEdevilled Audio SysTem is an audio compositor, supporting a wide range
of audio formats.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  media-sound/beast       < 0.7.1                          >= 0.7.1

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

BEAST, which is installed as setuid root, fails to properly check
whether it can drop privileges accordingly if seteuid() fails due to a
user exceeding assigned resource limits.

Impact
======

A local user could exceed his resource limit in order to prevent the
seteuid() call from succeeding. This may lead BEAST to keep running
with root privileges. Then, the local user could use the "save as"
dialog box to overwrite any file on the vulnerable system, potentially
leading to a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All BEAST users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-sound/beast-0.7.1"

References
==========

  [ 1 ] CVE-2006-2916
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2916
  [ 2 ] CVE-2006-4447
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4447

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

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

  http://security.gentoo.org/glsa/glsa-200704-22.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 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

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