Check Point Advisories

Heimdal Kerberos Denial of Service (CVE-2017-17439)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-1552
Date Published:	1 May 2018
Severity:	High
Last Updated:	Sunday 17 March, 2024
Source:
Industry Reference:	CVE-2017-17439
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Heimdal 7.4 and prior
Vulnerability Description	A denial-of-service vulnerability exists in Heimdal Kerberos. Successful exploitation of this vulnerability would allow a remote attacker to create a denial of service condition on the affected 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

In the IPS tab, click Protections and find the Heimdal Kerberos Denial of Service (CVE-2017-17439) 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: Heimdal Kerberos Denial of Service (CVE-2017-17439)