[ GLSA 201111-06 ] MaraDNS: Arbitrary code execution



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Gentoo Linux Security Advisory GLSA 201111-06
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http://security.gentoo.org/
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Severity: High
Title: MaraDNS: Arbitrary code execution
Date: November 20, 2011
Bugs: #352569
ID: 201111-06

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Synopsis
========

A buffer overflow vulnerability in MaraDNS allows remote attackers to
execute arbitrary code or cause a Denial of Service.

Background
==========

MaraDNS is a proxy DNS server with permanent caching.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-dns/maradns < 1.4.06 >= 1.4.06

Description
===========

A long DNS hostname with a large number of labels could trigger a
buffer overflow in the compress_add_dlabel_points() function of
dns/Compress.c.

Impact
======

A remote unauthenticated attacker could execute arbitrary code or cause
a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MaraDNS users should upgrade to the latest stable version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/maradns-1.4.06"

NOTE: This is a legacy GLSA. Updates for all affected architectures are
available since February 12, 2011. It is likely that your system is
already no longer affected by this issue.

References
==========

[ 1 ] CVE-2011-0520
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0520

Availability
============

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

http://security.gentoo.org/glsa/glsa-201111-06.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@xxxxxxxxxx or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2011 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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