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Update Protection against Microsoft Internet Explorer CStyleSheet Uninitialized Memory Corruption Vulnerability (MS10-035)

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Check Point Reference: CPAI-2010-087
Date Published:
Severity:
Last Updated:
Source: Microsoft Security Bulletin MS10-035
Industry Reference(s): CVE-2010-1259
CVE-2010-1262
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?
Internet Explorer 6 SP1 when installed on Microsoft Windows 2000 SP4

Internet Explorer 6 for:
Windows XP SP2
Windows XP SP3
Windows XP Professional x64 Edition SP2
Windows Server 2003 SP2
Windows Server 2003 x64 Edition SP2
Windows Server 2003 with SP2 (Itanium)

Internet Explorer 7 for:
Windows XP SP2
Windows XP SP3
Windows XP Professional x64 Edition SP2
Windows Server 2003 SP2
Windows Server 2003 x64 Edition SP2
Windows Server 2003 with SP2 (Itanium)
Windows Vista SP1
Windows Vista SP2
Windows Vista x64 Edition SP1
Windows Vista x64 Edition SP2
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 (Itanium)
Windows Server 2008 (Itanium) SP2

Internet Explorer 8 for:
Windows XP SP2
Windows XP SP3
Windows XP Professional x64 Edition SP2
Windows Server 2003 SP2
Windows Server 2003 x64 Edition SP2
Windows Vista SP1
Windows Vista SP2
Windows Vista x64 Edition SP1
Windows Vista x64 Edition SP2
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 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 (Itanium)

Vulnerability Description
Multiple memory corruption vulnerabilities have been reported in Microsoft Internet Explorer. A remote attacker could exploit these issues by convincing a user to open a maliciously crafted HTML file with Internet Explorer, which will cause the browser to crash and may allow execution of arbitrary commands.
Update/Patch Available
Update patches:
Microsoft Security Bulletin MS10-035
Vulnerability Details
The vulnerabilities are due to the way Internet Explorer accesses an object that has not been correctly initialized or has been deleted. To trigger this issue, an attacker may create a malicious web page that will cause Internet Explorer to exit unexpectedly. Successful exploitation of these vulnerabilities will crash the browser, and may allow execution of 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/R71

How Can I Protect My Network?
1. In the IPS tab, click Protections > By Protocol > Web Intelligence > HTTP Client Protections > Microsoft Internet Explorer Vulnerabilities.
2. In the right pane, double-click the Internet Explorer CStyleSheet Uninitialized Memory Corruption (MS10-035) 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: Web Client Enforcement Violation
Attack Information: Internet Explorer CStyleSheet uninitialized memory corruption (MS10-035)

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

How Can I Protect My Network?
1. In the SmartDefense tab, click Web Intelligence > HTTP Client Protections > Microsoft Internet Explorer Vulnerabilities > Internet Explorer CStyleSheet Uninitialized Memory Corruption (MS10-035).
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: Web Client Enforcement Violation
Attack Information: Internet Explorer CStyleSheet uninitialized memory corruption (MS10-035)

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 Web Intelligence > HTML, and select the Internet Explorer protection group.
3. Click Internet Explorer Uninitialized Memory Corruption (MS10-035) (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: Internet Explorer Vulnerabilities
Description: Internet Explorer Uninitialized Memory Corruption (MS10-035)