Update Protection against Microsoft Office Excel MSO Large SPID Read AV Code Execution Vulnerability (MS10-087)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-306
Date Published:
Severity:
Last Updated:
Source:	Microsoft Security Bulletin MS10-087
Industry Reference(s):	CVE-2010-3336
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? Microsoft Office XP SP3 Microsoft Office 2004 for Mac Microsoft Office 2008 for Mac Microsoft Office for Mac 2011 Open XML File Format Converter for Mac
Vulnerability Description A memory corruption vulnerability has been identified in Microsoft Excel. Microsoft Excel is a popular spreadsheet application. A remote attacker could exploit this issue via a malformed Excel file. Successful exploitation of this vulnerability may allow execution of arbitrary code on a target system.

Update/Patch Available Apply patches: Microsoft Security Bulletin MS10-087
Vulnerability Details The vulnerability is due to an error in Microsoft Office Excel that fails to properly parse specially crafted Excel files. A remote attacker could trigger this flaw by convincing a victim to open a malicious Office file. Successful exploitation of this issue may corrupt system memory, allowing execution of arbitrary code on a vulnerable system.

Protection Overview
This protection will detect and block the transferring of malformed Excel files over HTTP.

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 > Content Protection.
2. In the right pane, double-click the Microsoft Office Excel MSO Large SPID Read AV Code Execution (MS10-087) 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 Office Excel MSO large SPID read AV code execution (MS10-087)

VPN-1 NGX R65 & VSX NGX R65

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

Microsoft Office Excel MSO Large SPID Read AV Code Execution (MS10-087)

3. In the configuration pane, under Settings > Mode, check Active.
4. Install policy on all modules.

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 Application Intelligence > Badfiles, and select the Microsoft Office Parser protection group.
3. Click Microsoft Office MSO Large SPID Read AV Code Execution (MS10-087) (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: Vulnerability in MS-Office file
Description: Microsoft Office MSO Large SPID Read AV Code Execution (MS10-087)

Legal Notice for Threat Center Advisories