Check Point Advisories

NTP Servers Monlist Command Denial of Service (CVE-2013-5211)

Check Point Reference: CPAI-2014-0750
Date Published: 19 Jan 2014
Severity: High
Last Updated: 13 May 2019
Industry Reference:CVE-2013-5211
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable?
Vulnerability Description There exists a design flaw in NTP servers that can allow attackers to perform DoS attacks against target machines. A remote attacker can leverage this flaw by sending a specially crafted request to an affected NTP server.

Protection Overview

This protection will detect and block the transferring of specially crafted requests to the server.

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 NTP Servers Monlist Command Denial of Service 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:  NTP Enforcement Violation.
Attack Information:  NTP Servers Monlist Command Denial of Service

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