Check Point Advisories

Microsoft Multiple Products Out of Bounds Write (CVE-2021-34478)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1832
Date Published:	24 Aug 2023
Severity:	High
Last Updated:	Thursday 24 August, 2023
Source:
Industry Reference:	CVE-2021-34478
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft 365 Apps Enterprise Edition Microsoft Office 2019
Vulnerability Description	An out of bounds write vulnerability exists in multiple Microsoft products. Successful exploitation of this vulnerability could allow a remote attacker to obtain sensitive information.

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 Microsoft Multiple Products Out of Bounds Write (CVE-2021-34478) 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: Content Protection Violation.
Attack Information: Microsoft Multiple Products Out of Bounds Write (CVE-2021-34478)