Check Point Advisories

Microsoft Windows Media Encoder Insecure Library Loading (MS10-094; CVE-2010-3965)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-343
Date Published:	14 Dec 2010
Severity:	Critical
Last Updated:	Tuesday 14 December, 2010
Source:
Industry Reference:	CVE-2010-3965
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	Microsoft Windows Media Encoder is a production tool for converting both live and prerecorded audio and video to Windows Media Format. A remote code execution vulnerability has been reported in the way that Microsoft Office handles the loading of DLL files. The vulnerability is caused when the Windows Media Encoder incorrectly restricts the path from which external libraries are loaded. A remote attacker may exploit this issue by convincing a user to open a legitimate .prx file that is located in the same network directory as a specially crafted dynamic link library (DLL) file. Successful exploitation of this vulnerability could allow the attacker to run arbitrary code on an affected system.

Protection Overview

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

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 Windows Media Encoder Insecure Library Loading (MS10-094) 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 Windows Media Encoder insecure library loading (MS10-094)