[ GLSA 200812-19 ] PowerDNS: Multiple vulnerabilities

[Pierre-Yves Rofes <py () gentoo org>]

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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     < 2.9.21.2                           >= 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 ">=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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