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Gentoo Linux Security Advisory                           GLSA 200711-15
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                                            http://security.gentoo.org/
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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-2007-4619

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

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

  http://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
security@gentoo.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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