Check Point Advisories

Microsoft Browser Scripting Engine Memory Corruption (CVE-2017-8635)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0711
Date Published:	28 Aug 2017
Severity:	High
Last Updated:	Monday 28 August, 2017
Source:	Microsoft CVE-2017-8635
Industry Reference:	CVE-2017-8635
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	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 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 Microsoft Edge on Windows Server 2016 Microsoft Edge on Windows 10 Version 1607 for 32-bit Systems Microsoft Edge on Windows 10 Version 1607 for x64-based Systems Microsoft Edge on Windows 10 Version 1703 for 32-bit Systems Microsoft Edge on Windows 10 Version 1703 for x64-based Systems
Vulnerability Description	A memory corruption vulnerability exists in Microsoft Browsers. The vulnerability is due to an error when handling objects in memory. A remote attacker can exploit this vulnerability and execute arbitrary code in the context of the current user.

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 Scripting Engine Memory Corruption (CVE-2017-8635) 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 Scripting Engine Memory Corruption (CVE-2017-8635)