full-disclosure - [ GLSA 200710-04 ] libsndfile: Buffer overflow

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Message-ID: <20071007202201.GA19345@falco.falcal.net>
Date: Sun, 7 Oct 2007 22:22:01 +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 200710-04 ] libsndfile: Buffer overflow

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Gentoo Linux Security Advisory                           GLSA 200710-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libsndfile: Buffer overflow
      Date: October 07, 2007
      Bugs: #192834
        ID: 200710-04

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Synopsis
========

A buffer overflow vulnerability has been discovered in libsndfile.

Background
==========

libsndfile is a library for reading and writing various formats of
audio files including WAV and FLAC.

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

    -------------------------------------------------------------------
     Package                /   Vulnerable   /              Unaffected
    -------------------------------------------------------------------
  1  media-libs/libsndfile      < 1.0.17-r1               >= 1.0.17-r1

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

Robert Buchholz of the Gentoo Security team discovered that the
flac_buffer_copy() function does not correctly handle FLAC streams with
variable block sizes which leads to a heap-based buffer overflow
(CVE-2007-4974).

Impact
======

A remote attacker could exploit this vulnerability by enticing a user
to open a specially crafted FLAC file or network stream with an
application using libsndfile. This might lead to the execution of
arbitrary code with privileges of the user playing the file.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libsndfile users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libsndfile-1.0.17-r1"

References
==========

  [ 1 ] CVE-2007-4974
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4974

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

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

  http://security.gentoo.org/glsa/glsa-200710-04.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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