Check Point Advisories

Microsoft Internet Explorer Security Feature Bypass (CVE-2018-0949)

Vulnerability
Protection

Check Point Reference:	CPAI-2018-0670
Date Published:	10 Jul 2018
Severity:	High
Last Updated:	Tuesday 10 July, 2018
Source:	Microsoft CVE-2018-0949
Industry Reference:	CVE-2018-0949
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 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 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 11 on Windows 10 Version 1709 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems Internet Explorer 10 on Windows Server 2012
Vulnerability Description	A security feature bypass vulnerability exists in Microsoft Internet Explorer. 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 Internet Explorer.

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 Internet Explorer Security Feature Bypass (CVE-2018-0949) 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 Internet Explorer Security Feature Bypass (CVE-2018-0949)