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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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