Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

                    ESB-2006.0835 -- [Win][UNIX/Linux]
             OpenPKG-SA-2006.033 - OpenLDAP Denial of Service
                             14 November 2006


        AusCERT Security Bulletin Summary

Product:              OpenLDAP
Publisher:            OpenPKG
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-5779

Original Bulletin:  

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

- --------------------------BEGIN INCLUDED TEXT--------------------

Hash: SHA1


OpenPKG Security Advisory                                   OpenPKG GmbH
http://openpkg.org/security/                          http://openpkg.com
OpenPKG-SA-2006.033                                           2006-11-10

Package:          openldap
Vulnerability:    denial of service
OpenPKG Specific: no

Affected Series:  Affected Packages:            Corrected Packages:
E1.0-SOLID        <= openldap-2.3.28-E1.0.0     >= openldap-2.3.28-E1.0.1
2-STABLE-20061018 <= openldap-2.3.27-2.20061018 >= openldap-2.3.29-2.20061110
2-STABLE          <= openldap-2.3.28-2.20061022 >= openldap-2.3.29-2.20061110
CURRENT           <= openldap-2.3.28-20061022   >= openldap-2.3.29-20061110

  Evgeny Legerov discovered [0] a vendor-confirmed [1] Denial-of-Service
  (DoS) vulnerability in OpenLDAP [2]. The vulnerability allows remote
  attackers to cause a DoS via a certain combination of LDAP "Bind"
  requests that trigger an assertion failure in "libldap". The flaw is
  caused by incorrectly computing the length of a normalized name. The
  Common Vulnerabilities and Exposures (CVE) project assigned the id
  CVE-2006-5779 [3] to the problem.

  [0] http://www.securityfocus.com/archive/1/archive/1/450728/100/0/threaded
  [1] http://www.openldap.org/its/index.cgi/Software%20Bugs?id=4740 
  [2] http://www.openldap.org/
  [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5779

For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) which
you can retrieve from http://openpkg.org/openpkg.org.pgp. Follow the
instructions on http://openpkg.org/security/signatures/ for details on
how to verify the integrity of this advisory.

Comment: OpenPKG <openpkg@openpkg.org>


- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:


Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.

Comment: http://www.auscert.org.au/render.html?it=1967