Check Point Advisories

Mozilla Firefox Use After Free (CVE-2020-26950)

Vulnerability
Protection

Check Point Reference:	CPAI-2020-3464
Date Published:	8 May 2022
Severity:	High
Last Updated:	Sunday 08 May, 2022
Source:
Industry Reference:	CVE-2020-26950
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Mozilla Firefox prior to 82.0.3 Mozilla Firefox ESR prior to 78.4.1 Mozilla Thunderbird prior to 78.4.2
Vulnerability Description	A use-after-free vulnerability exists in Mozilla Firefox. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system.

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 Mozilla Firefox Use After Free (CVE-2020-26950) 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 Use After Free (CVE-2020-26950)