The DNS server implementation, for PKI-based authentication, must implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-205205	SRG-APP-000401-DNS-000051	SV-205205r879774_rule		Medium

Description
Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer authorized (users with revoked certificates). SIG(0) is used for server-to-server authentication for DNS transactions, and it uses PKI-based authentication. So, in cases where SIG(0) is being used instead of TSIG (which uses a shared key, not PKI-based authentication), this requirement is applicable.

Description

Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer authorized (users with revoked certificates). SIG(0) is used for server-to-server authentication for DNS transactions, and it uses PKI-based authentication. So, in cases where SIG(0) is being used instead of TSIG (which uses a shared key, not PKI-based authentication), this requirement is applicable.

STIG	Date
Domain Name System (DNS) Security Requirements Guide	2024-02-27

Details

Check Text ( C-5472r392528_chk )
Review the DNS server implementation configuration to determine if the DNS server, for PKI-based authentication (i.e., SIG(0)), implements a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network. If the DNS server does not implement such a cache of revocation data, this is a finding.

Fix Text (F-5472r392529_fix)
Configure the DNS server, for PKI-based authentication, to implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.