Check Point Advisories

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

Check Point Reference: CPAI-2016-0449
Date Published: 14 Jun 2016
Severity: Critical
Last Updated: 5 Jul 2017
Source: Microsoft Security Bulletin MS16-077
Industry Reference:CVE-2016-3236
Protection Provided by:

Security Gateway
R80, R77, R76, 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 AvaliableApply 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 / R76 / R75

  1. 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.
  2. Install policy on all modules.

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)

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