Check Point Advisories

Microsoft Edge asm.js Type Confusion (CVE-2017-0093)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0358
Date Published:	1 May 2017
Severity:	High
Last Updated:	Sunday 07 May, 2017
Source:	Microsoft
Industry Reference:	CVE-2017-0093
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Edge
Vulnerability Description	A type confusion vulnerability has been reported in Microsoft Edge Scripting Engine. The vulnerability is due to improper parsing of eval function arguments when it accesses an asm.js function. A remote attacker could exploit this vulnerability by enticing the target user to open a specially crafted web page.

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 Edge asm.js Type Confusion 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 Edge asm.js Type Confusion