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

[news 28]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Gentoo Linux Security Advisory GLSA 201202-03

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

http://security.gentoo.org/

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 

Severity: Normal

Title: MaraDNS: Denial of Service

Date: February 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

-------------------------------------------------------------------

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 ( -at -) 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