Check Point Advisories

Ivanti Avalanche Insecure Deserialization (CVE-2021-42127)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1786
Date Published:	27 Jun 2023
Severity:	Critical
Last Updated:	Tuesday 27 June, 2023
Source:
Industry Reference:	CVE-2021-42127
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Ivanti Avalanche prior to 6.3.3
Vulnerability Description	An insecure deserialization vulnerability exists in Ivanti Avalanche. 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 Ivanti Avalanche Insecure Deserialization (CVE-2021-42127) 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: Ivanti Avalanche Insecure Deserialization (CVE-2021-42127)