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Gentoo Linux Security Advisory 200710-3

Gentoo Linux Security Advisory 200710-3
Posted Oct 9, 2007
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200710-03 - David Thiel of iSEC Partners discovered a heap-based buffer overflow in the _01inverse() function in res0.c and a boundary checking error in the vorbis_info_clear() function in info.c. libvorbis is also prone to several Denial of Service vulnerabilities in form of infinite loops and invalid memory access with unknown impact. Versions less than 1.2.0 are affected.

tags | advisory, denial of service, overflow, vulnerability
systems | linux, gentoo
advisories | CVE-2007-3106, CVE-2007-4029, CVE-2007-4065, CVE-2007-4066
SHA-256 | 7a907b2348ce906142b3aba0da5822b07995f88558fb4c797503d30416a2a1e2

Gentoo Linux Security Advisory 200710-3

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Gentoo Linux Security Advisory GLSA 200710-03
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Severity: Normal
Title: libvorbis: Multiple vulnerabilities
Date: October 07, 2007
Bugs: #186716
ID: 200710-03

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Synopsis
========

A buffer overflow vulnerability and several memory corruptions have
been discovered in libvorbis.

Background
==========

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
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-libs/libvorbis < 1.2.0 >= 1.2.0

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

David Thiel of iSEC Partners discovered a heap-based buffer overflow in
the _01inverse() function in res0.c and a boundary checking error in
the vorbis_info_clear() function in info.c (CVE-2007-3106 and
CVE-2007-4029). libvorbis is also prone to several Denial of Service
vulnerabilities in form of infinite loops and invalid memory access
with unknown impact (CVE-2007-4065 and CVE-2007-4066).

Impact
======

A remote attacker could exploit these vulnerabilities by enticing a
user to open a specially crafted Ogg Vorbis file or network stream with
an application using libvorbis. This might lead to the execution of
arbitrary code with privileges of the user playing the file or a Denial
of Service by a crash or CPU consumption.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libvorbis users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libvorbis-1.2.0"

References
==========

[ 1 ] CVE-2007-3106
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3106
[ 2 ] CVE-2007-4029
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4029
[ 3 ] CVE-2007-4065
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4065
[ 4 ] CVE-2007-4066
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4066

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

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

http://security.gentoo.org/glsa/glsa-200710-03.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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