Check Point Advisories

OpenLDAP BER Decoding Denial of Service (CVE-2008-2952)

Check Point Reference: CPAI-2008-404
Date Published: 24 Mar 2010
Severity: High
Last Updated: Thursday 05 November, 2015
Source:
Industry Reference:CVE-2008-2952
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description OpenLDAP is an open-source implementation of the Lightweight Directory Access Protocol (LDAP) service. There exists a denial of service vulnerability in OpenLDAP slapd. The flaw is due to a design error when decoding ASN.1 BER network messages. A remote unauthenticated attacker can trigger this vulnerability by sending a crafted ASN.1 BER-encoded message to the target server. Successful attack could allow for raising a denial of service condition to the affected service. Upon processing malicious LDAP messages, the slapd process will terminate, which triggers a Denial of Service condition of the target LDAP service. The service needs to be restarted manually to resume the normal operation.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the OpenLDAP BER Decoding Denial of Service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  LDAP Protection Violation.
Attack Information:  OpenLDAP BER decoding denial of service

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