Check Point Advisories

Adobe Acrobat Use After Free (CVE-2021-28639)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1551
Date Published:	12 Jan 2023
Severity:	High
Last Updated:	Monday 12 June, 2023
Source:
Industry Reference:	CVE-2021-28639
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Adobe Systems Acrobat Reader 2017 (Classic) prior to 2017.011.30199 Adobe Systems Acrobat Reader DC (Continuous) prior to 2021.005.20058 Adobe Systems Acrobat Reader 2020 (Classic) prior to 2020.004.30006
Vulnerability Description	A use-after-free vulnerability exists in Adobe Acrobat. 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 Use After Free (CVE-2021-28639) 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 Products Violation.
Attack Information: Adobe Acrobat Use After Free (CVE-2021-28639)