Check Point Advisories

Microsoft Multiple Products Heap Buffer Overflow (CVE-2021-34501)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1844
Date Published:	5 Sep 2023
Severity:	High
Last Updated:	Tuesday 05 September, 2023
Source:
Industry Reference:	CVE-2021-34501
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft 365 Apps Enterprise Edition Microsoft Excel 2013 Service Pack 1 Runtime Edition Microsoft Excel 2013 Service Pack 1 Runtime Edition Microsoft Excel 2016 Microsoft Office 2019 Microsoft Office 2019 for macOS Microsoft Office Online Server
Vulnerability Description	A heap buffer overflow vulnerability exists in multiple Microsoft products. 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 Microsoft Multiple Products Heap Buffer Overflow (CVE-2021-34501) 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 Heap Buffer Overflow (CVE-2021-34501)