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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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