GLSA 201202-04: PowerDNS: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	PowerDNS: Denial of Service
Date:	02/22/2012
Bugs:	#398403
ID:	201202-04

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	Architecture(s)
net-dns/pdns	< 3.0.1	>= 3.0.1	All supported architectures

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

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.