The DNS server implementation must uniquely identify the other DNS server before responding to a server-to-server transaction.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-205169	SRG-APP-000158-DNS-000015	SV-205169r879599_rule		Medium

Description
Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. This applies to server-to-server (zone transfer) transactions only and is provided by TSIG/SIG(0), which enforces mutual server authentication using a key that is unique to each server pair (TSIG) or using PKI-based authentication (SIG(0)), thus uniquely identifying the other server.

Description

Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. This applies to server-to-server (zone transfer) transactions only and is provided by TSIG/SIG(0), which enforces mutual server authentication using a key that is unique to each server pair (TSIG) or using PKI-based authentication (SIG(0)), thus uniquely identifying the other server.

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

Details

Check Text ( C-5436r392423_chk )
Review the DNS server implementation configuration to determine if it validates other DNS servers' unique identify, through the use TSIG or SIG(0), when accepting server-to-server (zone transfer) transactions from the other DNS servers. If the DNS server does not validate other DNS servers' unique identity, through the use of either TSIG or SIG(0), when accepting server-to-server (zone transfer) transactions from those other DNS servers, this is a finding.

Check Text ( C-5436r392423_chk )

Review the DNS server implementation configuration to determine if it validates other DNS servers' unique identify, through the use TSIG or SIG(0), when accepting server-to-server (zone transfer) transactions from the other DNS servers.

If the DNS server does not validate other DNS servers' unique identity, through the use of either TSIG or SIG(0), when accepting server-to-server (zone transfer) transactions from those other DNS servers, this is a finding.

Fix Text (F-5436r392424_fix)
Configure the DNS server to verify another DNS server's unique identify, through the use of TSIG or SIG(0), when accepting server-to-server (zone transfer) transactions from other DNS servers.