GLSA 200908-08 ISC DHCP: dhcpd Denial of Service
Posted on: 08/18/2009 11:05 PM

A new security update has been released for Gentoo Linux - ISC DHCP: dhcpd Denial of Service. Here the announcement:

Gentoo Linux Security Advisory GLSA 200908-08
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http://security.gentoo.org/
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Severity: Normal
Title: ISC DHCP: dhcpd Denial of Service
Date: August 18, 2009
Bugs: #275231
ID: 200908-08

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Synopsis
========

dhcpd as included in the ISC DHCP implementation does not properly
handle special conditions, leading to a Denial of Service.

Background
==========

ISC DHCP is the reference implementation of the Dynamic Host
Configuration Protocol as specified in RFC 2131.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/dhcp lt; 3.1.2_p1 gt;= 3.1.2_p1

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

Christoph Biedl discovered that dhcpd does not properly handle certain
DHCP requests when configured both using "dhcp-client-identifier" and
"hardware ethernet".

Impact
======

A remote attacker might send a specially crafted request to dhcpd,
possibly resulting in a Denial of Service (daemon crash).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ISC DHCP users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose =net-misc/dhcp-3.1.2_p1

References
==========

[ 1 ] CVE-2009-1892
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1892

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

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

http://security.gentoo.org/glsa/glsa-200908-08.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 2009 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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