[ GLSA 200909-02 ] libvorbis: User-assisted execution of arbitrary code

--Sig_/Gw=sZttGPtxn+uOiMpxSyZJ
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200909-02
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: libvorbis: User-assisted execution of arbitrary code
      Date: September 07, 2009
      Bugs: #280590
        ID: 200909-02

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=3D=3D=3D=3D=3D=3D=3D=3D

A processing error in libvorbis might result in the execution of
arbitrary code or a Denial of Service.

Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

libvorbis is the reference implementation of the Xiph.org Ogg Vorbis
audio file format. It is used by many applications for playback of Ogg
Vorbis files.

Affected packages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  media-libs/libvorbis       < 1.2.3                       >=3D 1.2.3

Description
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Lucas Adamski reported that libvorbis does not correctly process file
headers, related to static mode headers and encoding books.

Impact
=3D=3D=3D=3D=3D=3D

A remote attacker could entice a user to play a specially crafted OGG
Vorbis file using an application that uses libvorbis, possibly
resulting in the execution of arbitrary code with the privileges of the
user running the application, or a Denial of Service.

Workaround
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

There is no known workaround at this time.

Resolution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

All libvorbis users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose =3Dmedia-libs/libvorbis-1.2.3

References
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

  [ 1 ] CVE-2009-2663
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-2663

Availability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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

  http://security.gentoo.org/glsa/glsa-200909-02.xml

Concerns?
=3D=3D=3D=3D=3D=3D=3D=3D=3D

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
=3D=3D=3D=3D=3D=3D=3D

Copyright 2009 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

--Sig_/Gw=sZttGPtxn+uOiMpxSyZJ
Content-Type: application/pgp-signature; name=signature.asc
Content-Disposition: attachment; filename=signature.asc

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.11 (GNU/Linux)

iEYEARECAAYFAkqkWokACgkQk+oqhfPAZGlhhwCdHxBd6byt2RK3/KJfdezBWxPL
LRgAoIGUINk6QW1FodfkdmVNjEEB8Q28
=82Ms
-----END PGP SIGNATURE-----

--Sig_/Gw=sZttGPtxn+uOiMpxSyZJ--