nss_ldap: Information disclosure

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Gentoo Linux Security Advisory                          
GLSA 200711-33
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                                            http://security.gentoo.or
g/
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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-200
7-5794

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

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

  ht
tp://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
securitygentoo.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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