Check Point Advisories

Microsoft Windows WPAD Proxy Discovery Elevation of Privilege (MS16-077; CVE-2016-3236)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0449
Date Published:	14 Jun 2016
Severity:	Critical
Last Updated:	Wednesday 05 July, 2017
Source:	Microsoft MS16-077
Industry Reference:	CVE-2016-3236
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows Vista Windows Server 2008 Windows 7 Windows Server 2008 R2 Windows 8.1 Windows Server 2012 and Windows Server 2012 R2 Windows RT 8.1 Windows 10 Server Core installation
Vulnerability Description	An elevation of privilege vulnerability exists in Microsoft Windows. The vulnerability is due to improper handling of certain proxy discovery scenarios using the Web Proxy Autodiscovery (WPAD) protocol method. A remote attacker can exploit this issue by sending specially crafted NBNS responses.
Update/Patch Avaliable	Apply patches from: MS16-077

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 WPAD Proxy Discovery Elevation of Privilege (MS16-077) 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 WPAD Proxy Discovery Elevation of Privilege (MS16-077)