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Update Protection against Microsoft Active Directory Denial of Service Vulnerability (MS08-035)

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Check Point Reference: CPAI-2008-081
Date Published:
Severity:
Last Updated:
Source: Microsoft Security Bulletin MS08-035
Industry Reference(s): CVE-2008-1445
Protection Provided by: VPN-1
  • NGX R65
  • NGX R62
  • NGX R61
  • NGX R60
VSX
  • NGX R65
InterSpect
  • NGX
Connectra
  • NGX R62
  • NGX R61
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Microsoft Windows 2000 Server SP4
Windows XP Professional SP2
Windows XP Professional SP3
Windows XP Professional x64 Edition
Windows XP Professional Edition SP2
Windows Server 2003 SP1
Windows Server 2003 SP2
Windows Server 2003 SP1
Windows Server 2003 SP2
Windows Server 2003 x64 Edition
Windows Server 2003 x64 Edition SP2
Windows Server 2003 x64 Edition
Windows Server 2003 x64 Edition SP2
Windows Server 2003 with SP1 (Itanium)
Windows Server 2003 with SP2 (Itanium)
Windows Server 2008
Windows Server 2008 x64 Edition
Windows Server 2008 (Itanium)
Vulnerability Description
A denial of service vulnerability has been reported in Microsoft Active Directory. 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 this issue to create a denial of service condition on a vulnerable system.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS08-035
Vulnerability Details
The vulnerability is due to an error in the LDAP service that fails to sufficiently validate specially crafted LDAP requests. A remote attacker may trigger this vulnerability by sending a specially crafted LDAP packet to the ADAM or an Active Directory server. Successful exploitation of this issue could create a denial of service condition, causing the system to become non-responsive.

Protection Overview
By enabling this protection, SmartDefense will detect and block malformed LDAP requests. IPS-1 will detect and block attempts to reuse a cookie during an LDAP search, which could be an attempt to exploit MS08-035.

In order for the protection to be activated, update your VPN-1/InterSpect product to the latest SmartDefense update. For information on how to update 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.

VPN-1 NGX R65 & R62

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > LDAP.
2. Select the following:

Block Microsoft Active Directory DoS Vulnerability (MS08-035)

3. In the configuration pane, under Settings > Mode, check Active.
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 DoS vulnerability (MS08-035)

VPN-1 NGX R61 & R60

How Can I Protect My Network?
1. In the SmartDefense tree, click Application Intelligence > LDAP.
2. Select the following:

Block Microsoft Active Directory DoS Vulnerability (MS08-035)

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 Active Directory DoS vulnerability (MS08-035)

VPN-1 VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > LDAP.
2. Select the following:

Block Microsoft Active Directory DoS Vulnerability (MS08-035)

3. In the configuration pane, under Settings > Mode, check Active.
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 DoS vulnerability (MS08-035)

InterSpect NGX

How Can I Protect My Network?
1. In the left pane, select Profiles > Default Protection and select the SmartDefense page of the profile.
2. In the SmartDefense tree, click Application Intelligence > LDAP.
3. Select the following protection:

Block Microsoft Active Directory DoS Vulnerability (MS08-035)

4. Install security 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 DoS vulnerability (MS08-035)

Connectra NGX R62 & R61

How Can I Protect My Network?
1. In the left-hand menu, click Security > SmartDefense > Application Intelligence.
2. In the Dynamic Attacks pane, select the following protection:

Block Microsoft Active Directory DoS Vulnerability (MS08-035)

3. Install policy on all modules.

How Do I Know if My Network is Under Attack?
Upon attack, the following entries will be logged:

Attack Name: LDAP Protections
Attack Information: Microsoft Active Directory DoS vulnerability (MS08-035)

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 Active Directory Cookie Reuse vulnerability (MS08-035) - 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: Active Directory Cookie Reuse vulnerability (MS08-035)