Check Point Advisories

Microsoft Browser Security Feature Bypass (CVE-2017-8592)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0537
Date Published:	11 Jul 2017
Severity:	High
Last Updated:	Tuesday 11 July, 2017
Source:	Microsoft CVE-2017-8592
Industry Reference:	CVE-2017-8592
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2012 Windows Server 2012 (Server Core installation) Windows 8.1 for 32-bit systems Windows 8.1 for x64-based systems Windows Server 2012 R2 Windows RT 8.1 Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 Internet Explorer 11 on Windows 8.1 for 32-bit systems Internet Explorer 11 on Windows 8.1 for x64-based systems Internet Explorer 11 on Windows Server 2012 R2 Internet Explorer 11 on Windows RT 8.1 Internet Explorer 11 on Windows 10 for 32-bit Systems Internet Explorer 11 on Windows 10 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems Internet Explorer 11 on Windows Server 2016 Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems Windows Server 2012 R2 (Server Core installation) Internet Explorer 10 on Windows Server 2012 Microsoft Edge on Windows 10 for 32-bit Systems Microsoft Edge on Windows 10 for x64-based Systems Microsoft Edge on Windows 10 Version 1511 for x64-based Systems Microsoft Edge on Windows 10 Version 1511 for 32-bit Systems Windows 10 for 32-bit Systems Windows 10 for x64-based Systems Windows 10 Version 1511 for x64-based Systems Windows 10 Version 1511 for 32-bit Systems Windows Server 2016 Windows 10 Version 1607 for 32-bit Systems Windows 10 Version 1607 for x64-based Systems Windows Server 2016 (Server Core installation) Windows Server 2008 for Itanium-Based Systems Service Pack 2 Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Vulnerability Description	An information disclosure vulnerability exists in Microsoft Browsers. The vulnerability is due to improper implementation of the mixed content warning security feature. A remote attacker can exploit this issue by enticing a user to open a specially crafted web-page with an affected version of Microsoft Browsers.

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 Browser Security Feature Bypass (CVE-2017-8592) 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: Web Client Enforcement Violation.
Attack Information: Microsoft Browser Security Feature Bypass (CVE-2017-8592)