Check Point Advisories

XStream Insecure Deserialization (CVE-2021-29505)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-2076
Date Published:	15 Jan 2024
Severity:	High
Last Updated:	Monday 15 January, 2024
Source:
Industry Reference:	CVE-2021-29505
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	XStream before 1.4.17
Vulnerability Description	An insecure deserialization vulnerability exists in XStream. Successful exploitation could result in remote code execution in the context of the service.

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 XStream Insecure Deserialization (CVE-2021-29505) 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: XStream Insecure Deserialization (CVE-2021-29505)