Check Point Advisories

Jenkins Filesystem Trigger Plugin XML External Entity Expansion (CVE-2021-21659)

Check Point Reference: CPAI-2021-1322
Date Published: 6 Nov 2022
Severity: High
Last Updated: Sunday 06 November, 2022
Source:
Industry Reference:CVE-2021-21659
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Jenkins Filesystem Trigger Plugin v0.48 and earlier
Vulnerability Description An XML external entity expansion vulnerability exists in Jenkins Filesystem Trigger Plugin. Successful exploitation of this vulnerability could result in the disclosure of file contents from the target 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

  1. In the IPS tab, click Protections and find the Jenkins Filesystem Trigger Plugin XML External Entity Expansion (CVE-2021-21659) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Jenkins Filesystem Trigger Plugin XML External Entity Expansion (CVE-2021-21659)

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