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Gentoo Linux Security Advisory                           GLSA 200803-28
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: OpenLDAP: Denial of Service vulnerabilities
      Date: March 19, 2008
      Bugs: #197446, #209677
        ID: 200803-28

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Synopsis
=======
Multiple Denial of Service vulnerabilities have been reported in
OpenLDAP.

Background
=========
OpenLDAP Software is an open source implementation of the Lightweight
Directory Access Protocol.

Affected packages
================
    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  net-nds/openldap      < 2.3.41                          >= 2.3.41

Description
==========
The following errors have been discovered in OpenLDAP:

* Tony Blake discovered an error which exists within the
  normalisation of "objectClasses" (CVE-2007-5707).

* Thomas Sesselmann reported that, when running as a proxy-caching
  server the "add_filter_attrs()" function in
  servers/slapd/overlay/pcache.c does not correctly NULL terminate
  "new_attrs" (CVE-2007-5708).

* A double-free bug exists in attrs_free() in the file
  servers/slapd/back-bdb/modrdn.c, which was discovered by Jonathan
  Clarke (CVE-2008-0658).

Impact
=====
A remote attacker can cause a Denial of Serivce by sending a malformed
"objectClasses" attribute, and via unknown vectors that prevent the
"new_attrs" array from being NULL terminated, and via a modrdn
operation with a NOOP (LDAP_X_NO_OPERATION) control.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All OpenLDAP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-nds/openldap-2.3.41"

References
=========
  [ 1 ] CVE-2007-5707
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5707 
  [ 2 ] CVE-2007-5708
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5708 
  [ 3 ] CVE-2008-0658
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0658 

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

http://security.gentoo.org/glsa/glsa-200803-28.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 2008 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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