Check Point Advisories

Foxit Reader JavaScript XFA Use After Free (CVE-2018-3850)

Vulnerability
Protection

Check Point Reference:	CPAI-2018-0999
Date Published:	7 Oct 2018
Severity:	High
Last Updated:	Sunday 25 November, 2018
Source:
Industry Reference:	CVE-2018-3850
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Foxit Reader
Vulnerability Description	A use after free vulnerability exists in Foxit Reader. This vulnerability is due to improper handling of freed JavaScript XML Forms Architecture objects.

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 Foxit Reader JavaScript XFA 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: Foxit Reader JavaScript XFA Use After Free