Check Point Advisories

OpenLDAP ldapsearch pagesize Double Free Denial of Service (CVE-2017-9287)

Check Point Reference: CPAI-2017-0499
Date Published: 11 Jun 2017
Severity: Medium
Last Updated: Sunday 18 June, 2017
Source: OpenLDAP
Industry Reference:CVE-2017-9287
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? OpenLDAP Foundation OpenLDAP prior to 2.4.45
Vulnerability Description A double free vulnerability exists in the ldapsearch function of OpenLDAP. The vulnerability is due to improper handling of ldapsearch queries with a pagesize of 0. A remote attacker can exploit this vulnerability by sending a crafted query to he target OpenLDAP server.

Protection Overview

This protection detects 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 ldapsearch pagesize Double Free 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 ldapsearch pagesize Double Free Denial of Service

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