Update Protection against Microsoft Works Converter Oversized Font Buffer Overflow Vulnerability (MS09-024)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-166
Date Published:
Severity:
Last Updated:
Source:	Microsoft Security Bulletin MS09-024
Industry Reference(s):	CVE-2009-1533
Protection Provided by:	Security Gateway R70 IPS-1 IPS-1 IPS-1 NGX R65
Who is Vulnerable? Microsoft Office 2000 SP3 Microsoft Office XP SP3 Microsoft Office 2003 SP3 Microsoft Office 2007 SP1 Microsoft Office 2007 SP2 Microsoft Works 8.5 Microsoft Works 9.0
Vulnerability Description A remote code execution vulnerability has been discovered in Microsoft Works Converter. Microsoft Works is home productivity software suite with fewer features than the Microsoft Office suite. The Microsoft Works Converter allows the user to open, edit, and save files in the Microsoft Works file format. A remote attacker could exploit this vulnerability via a malformed Microsoft Works file. Successful exploitation of this issue may allow execution of arbitrary code on a target system.

Update/Patch Available Apply patches: Microsoft Security Bulletin MS09-024
Vulnerability Details The vulnerability is due to an error in the Microsoft Works Converter that fails to properly validate the font size in malformed Works documents. A remote attacker could trigger this flaw by convincing a victim to open a specially crafted Microsoft Works file. Successful exploitation of this issue may allow execution of arbitrary code on a vulnerable system.

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

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, 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 Works Oversized Font Buffer Overflow (MS09-024) 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 Works oversized font buffer overflow (MS09-024)

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 CVE-2009-1533 Microsoft Works File Converter Buffer Overflow (MS09-024) (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: CVE-2009-1533 Microsoft Works File Converter Buffer Overflow (MS09-024)

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