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Update Protection against Microsoft Windows LSASS Malformed LDAP Messages Heap Overflow Vulnerability (MS10-068)

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Check Point Reference: CPAI-2010-230
Date Published:
Severity:
Source: Microsoft Security Bulletin MS10-068
Industry Reference(s): CVE-2010-0820
Protection Provided by: Security Gateway
  • R71
  • R70
VPN-1
  • NGX R65
VSX
  • NGX R65
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Active Directory:
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
 
Active Directory Application Mode (ADAM):
Windows XP SP3
Windows XP Professional x64 Edition SP2
Windows Server 2003 SP2
Windows Server 2003 x64 Edition SP2
 
Active Directory Lightweight Directory Service (AD LDS):
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
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 Server 2008 R2 for x64-based Systems
Vulnerability Description
An authenticated elevation of privilege 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 MS10-068
Vulnerability Details
The vulnerability is due to the way that the Local Security Authority Subsystem Service (LSASS) improperly handles certain LDAP messages. A remote attacker may trigger this vulnerability by sending specially crafted LDAP messages to a listening LSASS server. Successful exploitation of this vulnerability could allow the attacker to execute arbitrary code and take complete control of an affected system. 

Protection Overview
This protection will detect and block malformed LDAP packets. IPS-1 is has been preemptive against this vulnerability since 2008.

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/R71

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 Windows LSASS Malformed LDAP Messages Heap Overflow (MS10-068) 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 Windows LSASS malformed LDAP messages heap overflow (MS10-068) 

VPN-1 NGX R65 & VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > LDAP > Microsoft Windows LSASS Malformed LDAP Messages Heap Overflow (MS10-068).
2. In the configuration pane, under Settings > Mode, check Active.
3. 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 Windows LSASS malformed LDAP messages heap overflow (MS10-068)

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 LDAP Protocol Compliance protection group
3. Click BER record is too large (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: LDAP Protocol Compliance Backend
Description: BER record is too large