GLSA 200803-28: OpenLDAP: Denial of Service vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	OpenLDAP: Denial of Service vulnerabilities
Date:	03/19/2008
Bugs:	#197446, #209677
ID:	200803-28

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	Architecture(s)
net-nds/openldap	< 2.3.41	>= 2.3.41	All supported architectures

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

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 https://bugs.gentoo.org.