Check Point Advisories

ISC BIND Invalid TKEY Query Denial Of Service (CVE-2015-5477; CVE-2020-8625)

Check Point Reference: CPAI-2015-0908
Date Published: 1 Aug 2015
Severity: Critical
Last Updated: Monday 06 March, 2023
Industry Reference:CVE-2015-5477
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? BIND 9 from BIND 9.1.0 (inclusive) through BIND 9.9.7-P1 and BIND 9.10.2-P2
Vulnerability Description A denial of service vulnerability has been reported in ISC BIND DNS servers. The vulnerability is due to the way that the DNS server improperly handles invalid TKEY resource records. A remote attacker may exploit this issue by sending a specially crafted DNS query to a DNS server. Successful exploitation may cause the server to crash, 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 R81 / R80 / R77 / R75

  1. In the IPS tab, click Protections and find the ISC BIND Invalid TKEY Query Denial Of Service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  DNS Enforcement Violation.
Attack Information:  ISC BIND Invalid TKEY Query Denial Of Service

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