full-disclosure-uk January 2009 archive
Main Archive Page > Month Archives  > full-disclosure-uk archives
full-disclosure-uk: [Full-disclosure] [ GLSA 200901-11 ] Avahi:

[Full-disclosure] [ GLSA 200901-11 ] Avahi: Denial of Service

From: Pierre-Yves Rofes <py_at_nospam>
Date: Wed Jan 14 2009 - 23:05:35 GMT
To: gentoo-announce@gentoo.org

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

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@gentoo.org 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



Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/