Check Point Advisories

Microsoft Edge Chakra ParseCatch Type Confusion (CVE-2017-11764)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0870
Date Published:	24 Oct 2017
Severity:	High
Last Updated:	Monday 21 November, 2022
Source:	Microsoft
Industry Reference:	CVE-2017-11764
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Edge Microsoft Windows 10 Microsoft Windows Server 2016
Vulnerability Description	A type confusion vulnerability exists in Microsoft Edge Chakra JavaScript Engine. The vulnerability is due to a lack of validation in the ParseCatch() method which results in the generation on a malformed Abstract Syntax Tree (AST). 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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Microsoft Edge Chakra ParseCatch 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 Chakra ParseCatch Type Confusion