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Vigil@nce: OpenLDAP, denials of service

April 2009 by Marc Jacob

SYNTHESIS OF THE VULNERABILITY

An attacker can generate two denials of service in OpenLDAP.

Severity: 2/4

Consequences: denial of service of service

Provenance: intranet client

Means of attack: no proof of concept, no attack

Ability of attacker: expert (4/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Number of vulnerabilities in this bulletin: 2

Creation date: 06/04/2009

IMPACTED PRODUCTS

 OpenLDAP

DESCRIPTION OF THE VULNERABILITY

SSL/TLS client certificates are used to authenticate the LDAP
client. Two denials of service were announced in their handling by
OpenLDAP.

An attacker can use a client certificate to create a memory leak.
[grav:1/4; ITS#5849]

An attacker can use a certificate with a malicious DN
(Distinguished Name) in order to stop OpenLDAP. [grav:2/4;
ITS#5976]

An attacker can therefore connect to the LDAP service with a
malicious certificate in order to stop it.

CHARACTERISTICS

Identifiers: ITS#5849, ITS#5976, VIGILANCE-VUL-8599

http://vigilance.fr/vulnerability/OpenLDAP-denials-of-service-8599


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