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

[news 28]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Gentoo Linux Security Advisory GLSA 201202-04

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

http://security.gentoo.org/

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 

Severity: Normal

Title: PowerDNS: Denial of Service

Date: February 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

-------------------------------------------------------------------

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 ( -at -) 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