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Update Protection against Microsoft Forefront UAG Redirection Spoofing Vulnerability (MS10-089)

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Check Point Reference: CPAI-2010-313
Date Published:
Severity:
Last Updated:
Source: Microsoft Security Bulletin MS10-089
Industry Reference(s): CVE-2010-2732
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?
Forefront Unified Access Gateway 2010
Forefront Unified Access Gateway 2010 Update 1
Forefront Unified Access Gateway 2010 Update 2
Vulnerability Description
A spoofing vulnerability has been reported in Microsoft Forefront Unified Access Gateway (UAG). Microsoft Forefront UAG is a virtual private networking solution that provides secure remote access to corporate networks for remote employees and business partners. It incorporates various remote access technologies such as VPN, SSL-VPN, DirectAccess, and Remote Desktop Services. A remote attacker could exploit this issue to acquire sensitive information, such as the user's credentials.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS10-089 
Vulnerability Details
The vulnerability is due to an error in the Forefront UAG that fails to validate and confirm redirection to an external Web site. A remote attacker can exploit this flaw by directing an UAG user to a local UAG URL that will redirect the user's browser session to an arbitrary site that will host the second stage of the attack. Successful exploitation of this vulnerability would allow the attacker to impersonate a legitimate UAG Web interface.

Protection Overview
This protection will detect and block attempts to exploit this vulnerability.

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 > Remote Control Applications.
2. In the right pane, double-click the Microsoft Frorefront UAG Redirection Spoofing (MS10-089) 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: Remote Control Applications Violation
Attack Information: Microsoft Frorefront UAG redirection spoofing (MS10-089)

VPN-1 NGX R65 & VSX NGX R65

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

Microsoft Frorefront UAG Redirection Spoofing (MS10-089)

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: Remote Control Applications Violation 
Attack Information: Microsoft Frorefront UAG redirection spoofing (MS10-089)

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 Web Intelligence > WWW 2, and select the IIS Attacks protection group.
3. Click Microsoft Forefront Unified Access Gateway Redirection Issue (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: Attacks against IIS web servers
Description: Microsoft Forefront Unified Access Gateway Redirection Issue