Check Point Advisories

Microsoft Active Directory LDAP Invalid Free Allocation (MS09-018; CVE-2009-1138)

Check Point Reference: CPAI-2009-152
Date Published: 9 Jun 2009
Severity: Critical
Last Updated: Wednesday 15 May, 2019
Industry Reference:CVE-2009-1138
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70, R65

Who is Vulnerable?
Vulnerability Description Active Directory provides central authentication and authorization services for Windows-based systems. Active Directory Application Mode (ADAM) is a Lightweight Directory Access Protocol (LDAP) directory service that runs as a user service. A remote code execution vulnerability has been reported in Microsoft Active Directory. The vulnerability is due to incorrect freeing of memory by the LDAP service when processing malformed LDAP and LDAPS requests. A remote attacker may trigger this vulnerability by sending a specially crafted LDAP or LDAPS packet to the Active Directory server. Successful exploitation of this vulnerability may allow execution of arbitrary code on a target system.

Protection Overview

This protection will detect and block malformed LDAP requests sent to the vulnerable server.

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 / R71 / R70 / R65

  1. In the IPS tab, click Protections and find the Microsoft Active Directory LDAP Invalid Free Allocation (MS09-018) 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:  Microsoft Active Directory LDAP invalid free allocation (MS09-018)

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