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Update Protection against Microsoft DNS Server WPAD Registration Spoofing Vulnerability (MS09-008)

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Check Point Reference: CPAI-2009-032
Date Published:
Severity:
Last Updated:
Source: Microsoft Security Bulletin MS09-008
Industry Reference(s): CVE-2009-0093
Protection Provided by: Security Gateway
  • R70
VPN-1
  • NGX R65
  • NGX R62
  • NGX R61
  • NGX R60
VSX
  • NGX R65
InterSpect
  • NGX
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Microsoft Windows 2000 Server SP4
Windows Server 2003 SP1
Windows Server 2003 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 for 32-bit Systems
Windows Server 2008 for x64-based Systems
Vulnerability Description
A Web Proxy Auto-Discovery (WPAD) registration spoofing vulnerability has been reported in Microsoft DNS servers. WPAD feature enables web clients to automatically detect proxy settings without user intervention. DNS Spoofing allows an attacker to change a DNS entry so it would point to an IP of his own choice. This vulnerability could allow a remote attacker to spoof a web proxy, thereby redirecting Internet traffic from legitimate locations.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS09-008
Vulnerability Details
The vulnerability is due to an error in the Windows DNS server that fails to correctly validate who can register WPAD entries on the DNS server. By default a DNS server will allow any user to create a registration in the DNS database for WPAD if the name registration does not already exist. A remote attacker may exploit this issue by registering "WPAD" in the DNS database and point it to an IP address of his choice; it would allow the attacker to conduct a man in the middle attack against any browsers configured to use WPAD to discover proxy server settings.

Protection Overview

By enabling this protection, SmartDefense will detect and block attempts to register vulnerable names in the DNS database. IPS-1 will detect and block DNS update requests containing the names WPAD and ISATAP.

In order for the protection to be activated, update your Security Gateway/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.

Security Gateway R70

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Application Intelligence > DNS.
2. In the right pane, double-click DNS - General Settings. The Protection Details window opens. Click on Edit. The Protection Settings window opens.
3. Under "Monitor DNS connections over" select "UDP Only" or "Both TCP and UDP". Click OK.
4. In the Protections tree, click DNS > Cache Poisoning.
5. In the right pane, double-click the following protection:

Microsoft DNS Server WPAD Registration Spoofing (MS09-008)

6. In the Protection Details window, click on Edit. Choose the protection's Action (Override IPS Policy with: Prevent/Detect), and apply Additional Settings.
7. Install policy on all modules.

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

Attack Name: DNS Enforcement Violation
Attack Information: Microsoft DNS server WPAD registration spoofing (MS09-008)

VPN-1 NGX R65 & R62

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > DNS > Cache Poisoning > Microsoft DNS Server WPAD Registration Spoofing (MS09-008).
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: DNS Enforcement Violation
Attack Information: Microsoft DNS server WPAD registration spoofing (MS09-008)

VPN-1 NGX R61 & R60

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

Microsoft DNS Server WPAD Registration Spoofing (MS09-008)

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: DNS Enforcement Violation
Attack Information: Microsoft DNS server WPAD registration spoofing (MS09-008)

VPN-1 VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > DNS > Cache Poisoning > Microsoft DNS Server WPAD Registration Spoofing (MS09-008).
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: DNS Enforcement Violation
Attack Information: Microsoft DNS server WPAD registration spoofing (MS09-008)

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 > DNS > Cache Poisoning.
3. Select the following protection:

Microsoft DNS Server WPAD Registration Spoofing (MS09-008)

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: DNS Enforcement Violation
Attack Information: Microsoft DNS server WPAD registration spoofing (MS09-008)

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 > DNS, and select the Labels protection group.
3. Click DNS Update for ISATAP and DNS Update for WPAD (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: DNS Names and Labels Alerts
Description: DNS Update for WPAD

Alert Name: DNS Names and Labels Alerts
Description: DNS Update for ISATAP