GLSA 200611-25: OpenLDAP: Denial of Service vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	OpenLDAP: Denial of Service vulnerability
Date:	11/28/2006
Bugs:	#154349
ID:	200611-25

Synopsis

A flaw in OpenLDAP allows remote unauthenticated attackers to cause a Denial of Service.

Background

OpenLDAP is a suite of LDAP-related applications and development tools.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-nds/openldap	< 2.3.27-r3	>= 2.3.27-r3	All supported architectures

Description

Evgeny Legerov has discovered that the truncation of an incoming authcid longer than 255 characters and ending with a space as the 255th character will lead to an improperly computed name length. This will trigger an assert in the libldap code.

Impact

By sending a BIND request with a specially crafted authcid parameter to an OpenLDAP service, a remote attacker can cause the service to crash.

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"

References

CVE-2006-5779

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200611-25.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.