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[gentoo-announce] [ GLSA 201202-03 ] MaraDNS: Denial of Service

Posted on 22 February 2012
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201202-03
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http://security.gentoo.org/
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Severity: Normal
Title: MaraDNS: Denial of Service
Date: February 22, 2012
Bugs: #397431
ID: 201202-03

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Synopsis
========
A hash collision vulnerability in MaraDNS allows remote attackers to
cause a Denial of Service condition.

Background
==========
MaraDNS is a proxy DNS server with permanent caching.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/maradns < 1.4.09 >= 1.4.09

Description
===========
MaraDNS does not properly randomize hash functions to protect against
hash collision attacks.

Impact
======
A remote attacker could send many specially crafted DNS recursive
queries, possibly resulting in a Denial of Service condition.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
All MaraDNS users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/maradns-1.4.09"

References
==========
[ 1 ] CVE-2012-0024
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0024

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

http://security.gentoo.org/glsa/glsa-201202-03.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
https://bugs.gentoo.org.

License
=======
Copyright 2012 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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