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             AUSCERT External Security Bulletin Redistribution

                       ESB-2007.0950 -- [UNIX/Linux]
                     nss_ldap: Information disclosure
                             27 November 2007

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              nss_ldap
Publisher:            Gentoo
Operating System:     Gentoo
                      UNIX variants (UNIX, Linux, OSX)
Impact:               Access Confidential Data
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5794

Original Bulletin:    http://security.gentoo.org/glsa/glsa-200711-33.xml

Comment: This advisory references vulnerabilities in products which run on
         platforms other than Gentoo. It is recommended that administrators
         running nss_ldap check for an updated version of the software for
         their operating system.

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Gentoo Linux Security Advisory                           GLSA 200711-33
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: nss_ldap: Information disclosure
      Date: November 25, 2007
      Bugs: #198390
        ID: 200711-33

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Synopsis
========

A race condition might lead to theft of user credentials or information
disclosure in services using nss_ldap.

Background
==========

nss_ldap is a Name Service Switch module which allows 'passwd', 'group'
and 'host' database information to be pulled from LDAP.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  sys-auth/nss_ldap        < 258                             >= 258

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

Josh Burley reported that nss_ldap does not properly handle the LDAP
connections due to a race condition that can be triggered by
multi-threaded applications using nss_ldap, which might lead to
requested data being returned to a wrong process.

Impact
======

Remote attackers could exploit this race condition by sending queries
to a vulnerable server using nss_ldap, possibly leading to theft of
user credentials or information disclosure (e.g. Dovecot returning
wrong mailbox contents).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All nss_ldap users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-auth/nss_ldap-258"

References
==========

  [ 1 ] CVE-2007-5794
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5794

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

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

  http://security.gentoo.org/glsa/glsa-200711-33.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 2007 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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