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Check Point Advisories

Eclipse Mosquitto Denial Of Service (CVE-2019-11779)

Check Point Reference: CPAI-2019-1684
Date Published: 1 Mar 2020
Severity: Medium
Last Updated: 1 Mar 2020
Industry Reference:CVE-2019-11779
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? Eclipse Foundation Mosquitto 1.5 to 1.6.5
Vulnerability Description A stack overflow exists in Eclipse Mosquitto. The vulnerability is due to insufficient handling of the Topic in MQTT SUBSCRIBE messages. A remote attacker can exploit this vulnerability by sending a crafted MQTT SUBSCRIBE message with a large number of topic hierarchy separators in the topic. Successful exploitation could result in denial of service conditions on the server process.

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 Eclipse Mosquitto Denial Of Service (CVE-2019-11779) 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:  Application Servers Protection Violation.
Attack Information:  Eclipse Mosquitto Denial Of Service (CVE-2019-11779)

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