Check Point Advisories

Microsoft Active Directory LSASS Recursive Stack Overflow (MS09-066; CVE-2009-1928)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-288
Date Published:	10 Nov 2009
Severity:	High
Last Updated:	Monday 07 December, 2015
Source:
Industry Reference:	CVE-2009-1928
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 denial of service vulnerability has been discovered in implementations of Active Directory on Microsoft Windows. The vulnerability is due to an error in the LDAP service that improperly processes specific LDAP or LDAPS requests leading to stack space exhaustion. 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 could cause a users system to become non-responsive and require a restart.

Protection Overview

This protection will detect and block large number of LDAP abandon requests using LSASS.

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

In the IPS tab, click Protections and find the Microsoft Active Directory LSASS Recursive Stack Overflow (MS09-066) protection using the Search tool and Edit the protection's settings.
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 LSASS recursive stack overflow (MS09-066)