Check Point Advisories

Jenkins Generic Webhook Trigger Plugin External Entity Injection (CVE-2021-21669)

Vulnerability
Protection

Check Point Reference:	CPAI-2021-1377
Date Published:	24 Nov 2022
Severity:	Critical
Last Updated:	Thursday 24 November, 2022
Source:
Industry Reference:	CVE-2021-21669
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Jenkins Generic Webhook Trigger Plugin 1.72 and earlier
Vulnerability Description	An XXE vulnerability exists in Jenkins Generic Webhook Trigger Plugin. The vulnerability is due to insufficient validation of input parameters. Successful exploitation could lead to the disclosure of file contents for any file readable by Jenkins.

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 Jenkins Generic Webhook Trigger Plugin External Entity Injection (CVE-2021-21669) 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: Jenkins Generic Webhook Trigger Plugin External Entity Injection (CVE-2021-21669)