Check Point Advisories

Microsoft Word .docx Insecure Library Loading (MS11-023; CVE-2011-0107)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-220
Date Published:	7 Apr 2011
Severity:	High
Last Updated:	Wednesday 17 December, 2014
Source:
Industry Reference:	CVE-2011-0107
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	Microsoft Word is a popular word processing software. A remote code execution vulnerability has been reported in the way that Microsoft Word handles the loading of DLL files. The vulnerability is caused when Microsoft Office Word incorrectly restricts the path used for loading external libraries. An attacker could convince a user to open a legitimate Office-related file (such as a .docx file) that is located in the same network directory as a specially crafted dynamic link library (DLL) file. Then, while opening the legitimate file, Microsoft Office could attempt to load the DLL file and execute any code it contained. Successful exploitation of this vulnerability could allow the attacker to take complete control of an affected system.

Protection Overview

This protection will detect and block the transferring of suspicious DLL files over CIFS and Webdav.

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 / R71 / R70 / R65

In the IPS tab, click Protections and find the Microsoft Word .docx Insecure Library Loading (MS11-023) 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: Windows SMB Protection Violation.
Attack Information: Microsoft Word .docx insecure library loading (MS11-023)