[gentoo-announce] [ GLSA 200908-08 ] ISC DHCP: dhcpd Denial of Service

[news 28]

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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 < 3.1.2_p1 >= 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 ( -at -) 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