Check Point Advisories

Microsoft Word Document Stream Handling Code Execution (MS07-024; CVE-2007-0870)

Vulnerability
Protection

Check Point Reference:	CPAI-2007-237
Date Published:	10 Nov 2009
Severity:	High
Last Updated:	Wednesday 21 August, 2013
Source:
Industry Reference:	CVE-2007-0870
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Microsoft Word is a document authoring product released by the Microsoft Corporation. Microsoft Word is available packaged with the Microsoft Office suite, as well as in form of a standalone product. Its native file format is the Word Document, normally identified by the .doc file extension. A Word Document has numerous properties which define the appearance of the document, as well as some more advanced properties for document objects, such as URLs, embedded images, and so on. A stack buffer overflow vulnerability exists in the way Microsoft Word processes files. The vulnerability is a result of insufficient boundary checking while processing the WordDocument (or Main) stream. A remote attacker can exploit this vulnerability by enticing the target user to open a crafted Word file, potentially causing arbitrary code to be injected and executed in the security context of the current user. An attack targeting this vulnerability can result in the injection and execution of code. If code execution is successful, the behaviour of the target will depend on the intention of the attacker. Any code injected will be executed within the security context of the currently logged in user. In an attack case where code execution was unsuccessful, Word would terminate resulting in the loss of any unsaved data from the current session.

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 product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Microsoft Word Document Stream Handling Code Execution (MS07-024) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Content Protection Violation.
Attack Information: Microsoft Word document stream handling code execution (MS07-024)