Check Point Advisories

Sitecore XP Insecure Deserialization (CVE-2021-42237)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-0894
Date Published:	6 Feb 2022
Severity:	Critical
Last Updated:	Thursday 02 March, 2023
Source:
Industry Reference:	CVE-2021-42237
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Sitecore XP 7.5 Initial Release - Sitecore XP 7.5 Update-2 Sitecore XP 8.0 Initial Release - Sitecore XP 8.0 Update-7 Sitecore XP 8.1 Initial Release - Sitecore XP 8.1 Update-3 Sitecore XP 8.2 Initial Release - Sitecore XP 8.2 Update-7
Vulnerability Description	An insecure deserialization vulnerability exists in Sitecore XP. Successful exploitation of this vulnerability could allow a remote attacker to execute 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 Sitecore XP Insecure Deserialization (CVE-2021-42237) 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: Web Server Enforcement Violation.
Attack Information: Sitecore XP Insecure Deserialization (CVE-2021-42237)