Check Point Advisories

ISC BIND buffer.c REQUIRE Assertion Failure Denial of Service (CVE-2015-8705)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0282
Date Published:	12 Apr 2016
Severity:	Critical
Last Updated:	Monday 23 May, 2016
Source:	ISC AA-01336
Industry Reference:	CVE-2015-8705
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	ISC BIND 9.10.0 through 9.10.3-P2
Vulnerability Description	A denial-of-service vulnerability has been reported in BIND DNS package bind9. The vulnerability is due to improper conversion of OPT resource records (ECS options) to text format. A remote, unauthenticated attacker could exploit this vulnerability against Recursive or Authoritative DNS servers that perform debug logging by sending a crafted request or response. Successful exploitation could lead to denial-of-service.

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

In the IPS tab, click Protections and find the ISC BIND buffer.c REQUIRE Assertion Failure 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 buffer.c REQUIRE Assertion Failure Denial of Service