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[gentoo-announce] [ GLSA 200812-19 ] PowerDNS: Multiple vulnerabilities

Posted on 19 December 2008
Gentoo-announce

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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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