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Gentoo Linux Security Advisory                           GLSA 201202-04
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: PowerDNS: Denial of Service
     Date: February 22, 2012
     Bugs: #398403
       ID: 201202-04

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Synopsis
========

A vulnerability in PowerDNS could allow a remote attacker to create a
Denial of Service condition.

Background
==========

The PowerDNS nameserver is an authoritative-only nameserver which uses
a flexible backend architecture.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-dns/pdns                 < 3.0.1                    >= 3.0.1

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

A vulnerability has been found in PowerDNS which could cause a packet
loop of DNS responses.

Impact
======

A remote attacker could send specially crafted DNS response packets,
possibly resulting in a Denial of Service condition.

Workaround
==========

PowerDNS users can set "cache-ttl=0" in /etc/powerdns/pdns.conf and
then restart the PowerDNS daemon:

  # /etc/init.d/pdns restart

Please review the PowerDNS Security Advisory below for more workaround
details.

Resolution
==========

All PowerDNS users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-dns/pdns-3.0.1"

References
==========

[ 1 ] CVE-2012-0206
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0206
[ 2 ] PowerDNS Security Advisory 2012-01
      http://doc.powerdns.com/powerdns-advisory-2012-01.html

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

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

 http://security.gentoo.org/glsa/glsa-201202-04.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