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Update Protection against Microsoft .NET Framework Arbitrary Memory Modification Vulnerability (MS09-061)

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Check Point Reference: CPAI-2009-266
Date Published:
Severity:
Source: Microsoft Security Bulletin MS09-061
Industry Reference(s): CVE-2009-2497
Protection Provided by: Security Gateway
  • R70
VPN-1
  • NGX R65
VSX
  • NGX R65
Who is Vulnerable?
Microsoft .NET Framework 3.5
Microsoft .NET Framework 2.0
Microsoft Silverlight 2
Vulnerability Description
A remote code execution vulnerability exists in the Microsoft .NET Framework. The Microsoft .NET Framework is a software framework that includes a large library of coded solutions to common programming problems and a virtual machine that manages the execution of programs written specifically for the framework. An attacker could exploit this issue by constructing a specially crafted Web page that when viewed by a user, could allow the attacker to execute arbitrary code remotely.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS09-061
Vulnerability Details
This vulnerability is due to the way the Microsoft .NET Common Language Runtime (CLR) handles interfaces. The CLR allows applications to modify arbitrary memory in such a way that an attacker could execute arbitrary code on the vulnerable system.

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

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Application Intelligence > Content Protection.
2. In the right pane, double-click the Microsoft .NET Framework Arbitrary Memory Modification (MS09-061) 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: Content Protection Violation
Attack Information: Microsoft .NET framework arbitrary memory modification (MS09-061)

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

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > Content Protection > Microsoft .NET Framework Arbitrary Memory Modification (MS09-061).
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: Content Protection Violation
Attack Information: Microsoft .NET framework arbitrary memory modification (MS09-061)