Check Point Advisories

Adobe Acrobat and Reader Use After Free (APSB21-55: CVE-2021-39840)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0574
Date Published:	14 Sep 2021
Severity:	High
Last Updated:	Tuesday 14 September, 2021
Source:
Industry Reference:	CVE-2021-39840
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A use-after-free vulnerability exists in Adobe Acrobat and Reader. 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 Adobe Acrobat and Reader Use After Free (APSB21-55: CVE-2021-39840) 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: Adobe Reader Violation.
Attack Information: Adobe Acrobat and Reader Use After Free (APSB21-55: CVE-2021-39840)