[ GLSA 200903-06 ] nfs-utils: Access restriction bypass

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200903-06
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: nfs-utils: Access restriction bypass
      Date: March 07, 2009
      Bugs: #242696
        ID: 200903-06

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Synopsis
========

An error in nfs-utils allows for bypass of the netgroups restriction.

Background
==========

nfs-utils contains the client and daemon implementations for the NFS
protocol.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  net-fs/nfs-utils       < 1.1.3                           >= 1.1.3

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

Michele Marcionelli reported that nfs-utils invokes the hosts_ctl()
function with the wrong order of arguments, which causes TCP Wrappers
to ignore netgroups.

Impact
======

A remote attacker could bypass intended access restrictions, i.e. NFS
netgroups, and gain access to restricted services.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All nfs-utils users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-fs/nfs-utils-1.1.3"

References
==========

  [ 1 ] CVE-2008-4552
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4552

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

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

  http://security.gentoo.org/glsa/glsa-200903-06.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
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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