Check Point Advisories

NGINX NJS Denial of Service (CVE-2019-11837)

Check Point Reference: CPAI-2019-2058
Date Published: 17 May 2020
Severity: Medium
Last Updated: 17 May 2020
Industry Reference:CVE-2019-11837
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? NGINX NJS prior to 0.3.1
Vulnerability Description A denial of service (DoS) vulnerability exists in NGINX NJS. Successful exploitation of this vulnerability could allow a remote attacker to damage users 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 R80 / R77 / R75

  1. In the IPS tab, click Protections and find the NGINX NJS Denial of Service (CVE-2019-11837) 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:  NGINX NJS Denial of Service (CVE-2019-11837)

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