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[gentoo-announce] [ GLSA 201202-04 ] PowerDNS: Denial of Service

Posted on 22 February 2012
Gentoo-announce

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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


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