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Gentoo Linux Security Advisory GLSA 200804-22
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http://security.gentoo.org/
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Severity: Normal
Title: PowerDNS Recursor: DNS Cache Poisoning
Date: April 18, 2008
Bugs: #215567
ID: 200804-22
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Synopsis
========
Use of insufficient randomness in PowerDNS Recursor might lead to DNS
cache poisoning.
Background
==========
The PowerDNS Recursor is an advanced recursing nameserver.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/pdns-recursor < 3.1.5 >= 3.1.5
Description
===========
Amit Klein of Trusteer reported that insufficient randomness is used to
calculate the TRXID values and the UDP source port numbers.
Impact
======
A remote attacker could send malicious answers to insert arbitrary DNS
data into the cache. These attacks would in turn help an attacker to
perform man-in-the-middle and site impersonation attacks.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All PowerDNS Recursor users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/pdns-recursor-3.1.5"
References
==========
[ 1 ] CVE-2008-1637
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1637
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200804-22.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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