[ GLSA 200901-11 ] Avahi: Denial of Service



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Gentoo Linux Security Advisory GLSA 200901-11
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http://security.gentoo.org/
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Severity: Normal
Title: Avahi: Denial of Service
Date: January 14, 2009
Bugs: #250913
ID: 200901-11

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Synopsis
========

A Denial of Service vulnerability has been discovered in Avahi.

Background
==========

Avahi is a system that facilitates service discovery on a local
network.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/avahi < 0.6.24 >= 0.6.24

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

Hugo Dias reported a failed assertion in the
originates_from_local_legacy_unicast_socket() function in
avahi-core/server.c when processing mDNS packets with a source port of
0.

Impact
======

A remote attacker could send specially crafted packets to the daemon,
leading to its crash.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Avahi users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.24"

References
==========

[ 1 ] CVE-2008-5081
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5081

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

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

http://security.gentoo.org/glsa/glsa-200901-11.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@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

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



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