Check Point Advisories

Mozilla Firefox DOMParser Denial of Service

Vulnerability
Protection

Check Point Reference:	CPAI-2019-0858
Date Published:	15 Jul 2019
Severity:	High
Last Updated:	Monday 15 July, 2019
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Firefox version 67.0.4
Vulnerability Description	A denial of service vulnerability exists in Firefox DOMParser parseFromString function. Successful exploitation of this vulnerability could result in denial of service conditions.

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 Mozilla Firefox DOMParser Denial of Service 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: Mozilla Firefox DOMParser Denial of Service