GLSA 201202-03: MaraDNS: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	MaraDNS: Denial of Service
Date:	02/22/2012
Bugs:	#397431
ID:	201202-03

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	Architecture(s)
net-dns/maradns	< 1.4.09	>= 1.4.09	All supported architectures

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

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.