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Gentoo Linux Security Advisory                           GLSA 201202-03
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: MaraDNS: Denial of Service
     Date: February 22, 2012
     Bugs: #397431
       ID: 201202-03

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Synopsis
========

A hash collision vulnerability in MaraDNS allows remote attackers to
cause a Denial of Service condition.

Background
==========

MaraDNS is a proxy DNS server with permanent caching.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-dns/maradns              < 1.4.09                  >= 1.4.09

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

MaraDNS does not properly randomize hash functions to protect against
hash collision attacks.

Impact
======

A remote attacker could send many specially crafted DNS recursive
queries, possibly resulting in a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MaraDNS users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-dns/maradns-1.4.09"

References
==========

[ 1 ] CVE-2012-0024
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0024

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

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

 http://security.gentoo.org/glsa/glsa-201202-03.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
https://bugs.gentoo.org.

License
=======

Copyright 2012 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