Check Point Advisories

Microsoft Lync Insecure Library Loading Code Execution (MS12-039; CVE-2012-1849)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-254
Date Published:	18 Jun 2012
Severity:	High
Last Updated:	Monday 27 October, 2014
Source:
Industry Reference:	CVE-2012-1849
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description	A remote code execution vulnerability has been reported in Microsoft Lync. The vulnerability is due to an error in the way Microsoft Lync restricts the path used for loading external libraries. A remote attacker could exploit this issue by enticing a user to open a legitimate Lync file (such as an .ocsmeet file) that is located in the same network directory as a specially crafted dynamic link library (DLL) file. Successful exploitation will allow an attacker to execute arbitrary code on an affected system, in the security context of the logged on user.

Protection Overview

This protection will detect and block the transferring of malicious DLL files over a network share.

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

In the IPS tab, click Protections and find the Microsoft Lync Insecure Library Loading Code Execution (MS12-039) 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 Lync Insecure Library Loading Code Execution (MS12-039)