Check Point Advisories

Microsoft Edge AsmJsInterpreter Use After Free (CVE-2017-8603)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0656
Date Published:	6 Aug 2017
Severity:	High
Last Updated:	Sunday 13 August, 2017
Source:	Microsoft CVE-2017-8603
Industry Reference:	CVE-2017-8603
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Edge .
Vulnerability Description	A use-after-free vulnerability exists in Microsoft Edge. This vulnerability is due to an error while handling objects in memory when processing HTML and script code. A remote attacker could exploit these vulnerabilities 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 AsmJsInterpreter Use After Free 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 AsmJsInterpreter Use After Free