Update Protection against Microsoft Active Directory LSASS Recursive Stack Overflow Vulnerability (MS09-066)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-288
Date Published:
Severity:
Last Updated:
Source:	Microsoft Security Bulletin MS09-066
Industry Reference(s):	CVE-2009-1928
Protection Provided by:	Security Gateway R70 VPN-1 NGX R65 VSX NGX R65 IPS-1 IPS-1 IPS-1 NGX R65
Who is Vulnerable? Microsoft Windows 2000 SP4 Windows Server 2003 SP2 Windows Server 2003 x64 Edition SP2 Windows Server 2003 with SP2 (Itanium) Windows Server 2008 for 32-bit Systems Windows Server 2008 for 32-bit Systems SP2 Windows Server 2008 for x64-based Systems Windows Server 2008 for x64-based Systems SP2 Windows XP SP2 Windows XP SP3 Windows XP Professional x64 Edition SP2 Windows Server 2003 SP2 Windows Server 2003 x64 Edition SP2 Windows Server 2008 for 32-bit Systems Windows Server 2008 for 32-bit Systems SP2 Windows Server 2008 for x64-based Systems Windows Server 2008 for x64-based Systems SP2
Vulnerability Description A denial of service vulnerability has been discovered in implementations of Active Directory on Microsoft Windows. 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 attacker can exploit the vulnerability to cause a denial of service condition on the target system.

Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS09-066

Vulnerability Details
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 user’s 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/VPN-1 product to the latest IPS/SmartDefense update. For information on how to update IPS/SmartDefense, go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R70

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Application Intelligence > LDAP.
2. In the right pane, double-click the Microsoft Active Directory LSASS Recursive Stack Overflow (MS09-066) protection.
3. In the Protection Details window, click on Edit. Choose the protection's Action (Override IPS Policy with: Prevent/Detect), and apply Additional Settings.
4. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: LDAP Protections
Attack Information: Microsoft Active Directory LSASS recursive stack overflow (MS09-066)

VPN-1 NGX R65 & VPN-1 VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > LDAP > Microsoft Active Directory LSASS Recursive Stack Overflow (MS09-066).
2. In the configuration pane, under Settings > Mode, check Active.
3. Install policy on all modules.

IPS-1 & IPS-1 NGX R65

How Can I Protect My Network?

1. In the IPS-1 Policy Manager, click on the Protection tab.
2. In the Protection tree, click Network Security > LDAP, and select the MS ADAM protection group.
3. Click Microsoft Active Directory LSASS Recursive Stack Overflow (MS09-066) (IPS-1 NGX R65 only).
4. In the configuration pane, under Settings, check Active.
5. Click on Install Policy.

How Do I Know if My Network is Under Attack?

Upon attack, the following entries will be logged:

Alert Name: MS ADAM
Description: Microsoft Active Directory LSASS Recursive Stack Overflow (MS09-066)

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