GLSA 200803-28 OpenLDAP: Denial of Service vulnerabilities
Posted on: 03/20/2008 12:20 AM

A new security update has been released for Gentoo Linux - OpenLDAP: Denial of Service vulnerabilities. Here the announcement:

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 lt; 2.3.41 gt;= 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 "gt;=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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