Gentoo: 201209-19 NUT: Arbitrary code execution
Posted by Benjamin D. Thomas   
Gentoo A buffer overflow in NUT might allow remote attackers to execute arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 201209-19
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                                            http://security.gentoo.org/
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 Severity: High
    Title: NUT: Arbitrary code execution
     Date: September 27, 2012
     Bugs: #419377
       ID: 201209-19

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Synopsis
========

A buffer overflow in NUT might allow remote attackers to execute
arbitrary code.

Background
==========

Network UPS Tools (NUT) provide support for power devices.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-power/nut                < 2.6.3                    >= 2.6.3

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

An error in the addchar() function in parseconf.c may cause a buffer
overflow.

Impact
======

A remote attacker could send a specially crafted string to upsd,
possibly resulting in execution of arbitrary code with the privileges
of the process or a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All NUT users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-power/nut-2.6.3"

References
==========

[ 1 ] CVE-2012-2944
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2944

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

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

 http://security.gentoo.org/glsa/glsa-201209-19.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 2012 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