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Gentoo Linux Security Advisory                           GLSA 201606-07
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: dhcpcd: Multiple vulnerabilities
     Date: June 18, 2016
     Bugs: #571152
       ID: 201606-07

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Synopsis
========

Multiple vulnerabilities have been found in dhcpcd allowing remote
attackers to possibly execute arbitrary code or cause a Denial of
Service.

Background
==========

A fully featured, yet light weight RFC2131 compliant DHCP client

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/dhcpcd              < 6.10.0                  >= 6.10.0

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

A heap overflow can be trigged via malformed DHCP responses in the
print_option (via dhcp_envoption1) due to incorrect option length
values.  These vulnerabilities could also allow remote attackers to
trigger an invalid read/crash via malformed DHCP responses.

Impact
======

Remote attackers could possibly execute arbitrary code with the
privileges of the process or cause Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All dhcpcd users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/dhcpcd-6.10.0”

References
==========

[ 1 ] CVE-2016-1503
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1503
[ 2 ] CVE-2016-1504
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-1504

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

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

 https://security.gentoo.org/glsa/201606-07

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 2016 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