Check Point Advisories

ISC BIND Recursive Resolver Resource Consumption Denial of Service (CVE-2014-8500)

Vulnerability
Protection

Check Point Reference:	CPAI-2014-2313
Date Published:	21 Dec 2014
Severity:	Critical
Last Updated:	Sunday 14 February, 2016
Source:	ISC AA-01216
Industry Reference:	CVE-2014-8500
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70
Who is Vulnerable?	ISC BIND 9.0.x - 9.8.x ISC BIND 9.10.0 ISC BIND 9.10.1 ISC BIND 9.9.0 - 9.9.6
Vulnerability Description	A denial of service vulnerability exists in ISC BIND. The vulnerability is due to a design weakness in the way BIND follows DNS delegations. A remote attacker can exploit these vulnerabilities by sending a request to a recursive resolver forcing the resolver to issue a large number (possibly infinite) of queries. A successful attack could lead to resource exhaustion resulting in a denial of service condition.

Protection Overview

This protection will detect and block 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 / R71 / R70

In the IPS tab, click Protections and find the ISC BIND Recursive Resolver Resource Consumption Denial of Service 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 Recursive Resolver Resource Consumption Denial of Service