Check Point Advisories

ISC BIND TSIG Authentication Bypass (CVE-2017-3143)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0562
Date Published:	11 Jul 2017
Severity:	Critical
Last Updated:	Thursday 13 July, 2017
Source:
Industry Reference:	CVE-2017-3143
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	BIND 9.9.10, BIND 9.10.5, BIND 9.11.1.
Vulnerability Description	There exists an authentication bypass vulnerability in the TSIG protocol in BIND. This vulnerability is due to the way TSIG handles incorrect digest lengths. A successful attack can lead to an authentication bypass.

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

In the IPS tab, click Protections and find the ISC BIND TSIG Authentication Bypass (CVE-2017-3143) 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: DNS Enforcement Violation.
Attack Information: ISC BIND TSIG Authentication Bypass (CVE-2017-3143)