FLAC: Buffer overflow

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Gentoo Linux Security Advisory                          
GLSA 200711-15
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                                            http://security.gentoo.or
g/
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  Severity: Normal
     Title: FLAC: Buffer overflow
      Date: November 12, 2007
      Bugs: #195700
        ID: 200711-15

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Synopsis
========

Multiple integer overflow vulnerabilities were found in FLAC
possibly
allowing for the execution of arbitrary code.

Background
==========

The Xiph.org Free Lossless Audio Codec (FLAC) library is the
reference
implementation of the FLAC audio file format. It contains
encoders and
decoders in library and executable form.

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

   
------------------------------------------------------------
-------
     Package          /  Vulnerable  /                     
Unaffected
   
------------------------------------------------------------
-------
  1  media-libs/flac     < 1.2.1-r1                      
 >= 1.2.1-r1

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

Sean de Regge reported multiple integer overflows when
processing FLAC
media files that could lead to improper memory allocations
resulting in
heap-based buffer overflows.

Impact
======

A remote attacker could entice a user to open a specially
crafted FLAC
file or network stream with an application using FLAC. 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 FLAC users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=media-libs/flac-1.2.1-r1"

You should also run revdep-rebuild to rebuild any packages
that depend
on older versions of FLAC:

    # revdep-rebuild --library=libFLAC.*

References
==========

  [ 1 ] CVE-2007-4619
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-200
7-4619

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

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

  ht
tp://security.gentoo.org/glsa/glsa-200711-15.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
securitygentoo.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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