Check Point Advisories

Microsoft Defender SmartScreen Bypass (CVE-2024-21412)

Vulnerability
Protection

Check Point Reference:	CPAI-2024-0081
Date Published:	26 Feb 2024
Severity:	High
Last Updated:	Monday 26 February, 2024
Source:
Industry Reference:	CVE-2024-21412
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A bypass vulnerability exists in Microsoft Windows SmartScreen. Successful exploitation of this vulnerability would allow remote attackers to gain unauthorized access into 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 Defender SmartScreen Bypass (CVE-2024-21412) 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: Windows SMB Protection Violation.
Attack Information: Microsoft Defender SmartScreen Bypass (CVE-2024-21412)