Check Point Advisories

Exim MTA BDAT Denial Of Service (CVE-2017-16944)

Check Point Reference: CPAI-2017-1027
Date Published: 29 Nov 2017
Severity: Critical
Last Updated: 28 Jan 2018
Industry Reference:CVE-2017-16944
Protection Provided by:

Security Gateway
R80, R77, R76, R75

Who is Vulnerable? Exim version 4.88 and newer.
Vulnerability Description A denial of service vulnerability exists in Exim message transfer agent. The vulnerability is due to improper pointer resetting. A remote attacker can exploit this vulnerability by crafting a sequence of BDAT commands. Successful exploitation can lead to program crash on the effected 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 / R76 / R75

  1. In the IPS tab, click Protections and find the Exim MTA BDAT Denial Of Service (CVE-2017-16944) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

This protection's log will contain the following information:

Attack Name:  SMTP Protection Violation.
Attack Information:  Exim MTA BDAT Denial Of Service (CVE-2017-16944)

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