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

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Date: Sat, 7 Mar 2009 17:24:44 +0100
From: Robert Buchholz <rbu@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200903-06 ] nfs-utils: Access restriction
	bypass

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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@...too.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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