[Full-disclosure] [ GLSA 200907-12 ] ISC DHCP: dhcpclient Remote execution of arbitrary code

[Alex Legler]

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Gentoo Linux Security Advisory                           GLSA 200907-12
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                                            http://security.gentoo.org/
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  Severity: High
     Title: ISC DHCP: dhcpclient Remote execution of arbitrary code
      Date: July 14, 2009
      Bugs: #277729
        ID: 200907-12

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Synopsis
========

A buffer overflow in dhclient as included in the ISC DHCP
implementation allows for the remote execution of arbitrary code with
root privileges.

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     < 3.1.1-r1                          >= 3.1.1-r1

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

The Mandriva Linux Engineering Team has reported a stack-based buffer
overflow in the subnet-mask handling of dhclient.

Impact
======

A remote attacker might set up a rogue DHCP server in a victim's local
network, possibly leading to the execution of arbitrary code with root
privileges.

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-r1"

References
==========

  [ 1 ] CVE-2009-0692
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0692

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

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

  http://security.gentoo.org/glsa/glsa-200907-12.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 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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