[Full-disclosure] [ GLSA 200808-05 ] ISC DHCP: Denial of Service

[Tobias Heinlein]

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Gentoo Linux Security Advisory                           GLSA 200808-05
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: ISC DHCP: Denial of Service
      Date: August 06, 2008
      Bugs: #227135
        ID: 200808-05

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Synopsis
========

A Denial of Service vulnerability was discovered in ISC DHCP.

Background
==========

ISC DHCP is ISC's reference implementation of all aspects of the
Dynamic Host Configuration Protocol.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  net-misc/dhcp       < 3.1.1                              >= 3.1.1

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

A buffer overflow error was found in ISC DHCP server, that can only be
exploited under unusual server configurations where the DHCP server is
configured to provide clients with a large set of DHCP options.

Impact
======

A remote attacker could exploit this vulnerability to cause a Denial of
Service.

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-3.1.1"

References
==========

  [ 1 ] CVE-2007-0062
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0062

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

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

  http://security.gentoo.org/glsa/glsa-200808-05.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
http://bugs.gentoo.org.

License
=======

Copyright 2008 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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