GLSA 200812-19 PowerDNS: Multiple vulnerabilities
Posted on: 12/19/2008 11:50 PM

A new security update has been released for Gentoo Linux - PowerDNS: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200812-19
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http://security.gentoo.org/=

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Severity: Normal
Title: PowerDNS: Multiple vulnerabilities
Date: December 19, 2008
Bugs: #234032, #247079
ID: 200812-19

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Synopsis
========

Two vulnerabilities have been discovered in PowerDNS, possibly leading
to a Denial of Service and easing cache poisoning attacks.

Background
==========

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

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

-------------------------------------------------------------------=

Package / Vulnerable / Unaffected
-------------------------------------------------------------------=

1 net-dns/pdns lt; 2.9.21.2 gt;= 2.9.21.=
2

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

Daniel Drown reported an error when receiving a HINFO CH query
(CVE-2008-5277). Brian J. Dowling of Simplicity Communications
discovered a previously unknown security implication of the PowerDNS
behavior to not respond to certain queries it considers malformed
(CVE-2008-3337).

Impact
======

A remote attacker could send specially crafted queries to cause a
Denial of Service. The second vulnerability in itself does not pose a
security risk to PowerDNS Nameserver. However, not answering a query
for an invalid DNS record within a valid domain allows for a larger
spoofing window on third-party nameservers for domains being hosted by
PowerDNS Nameserver itself.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PowerDNS users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-dns/pdns-2.9.21.2"

References
==========

[ 1 ] CVE-2008-3337
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3337
[ 2 ] CVE-2008-5277
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5277

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

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

http://security.gentoo.org/glsa/glsa-200812-19.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
http://bugs.gentoo.org.

License
=======

Copyright 2008 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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