Check Point Advisories

Microsoft Windows Lockdown Policy .NET Remote Code Execution

Vulnerability
Protection

Check Point Reference:	CPAI-2018-0345
Date Published:	24 Apr 2018
Severity:	Critical
Last Updated:	Tuesday 24 April, 2018
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows 10 versions with UMCI enabled.
Vulnerability Description	A remote code execution vulnerability has been reported in Microsoft Windows Lockdown Policy. The vulnerability is due to an error in the .NET Framework. A remote attacker can exploit this issue by enticing a target user to open a specially crafted file.

Protection Overview

This protection detects 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 Windows Lockdown Policy .NET Remote Code Execution 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: Microsoft Windows Operating System.
Attack Information: Microsoft Windows Lockdown Policy .NET Remote Code Execution