The DNS server implementation must implement cryptographic mechanisms to detect changes to information during transmission unless otherwise protected by alternative physical safeguards, such as, at a minimum, a Protected Distribution System (PDS).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-54895	SRG-APP-000440-DNS-000065	SV-69141r1_rule		Medium

Description
Encrypting information for transmission protects information from unauthorized disclosure and modification. Cryptographic mechanisms implemented to protect information integrity include, for example, cryptographic hash functions which have common application in digital signatures, checksums, and message authentication codes. Confidentiality is not an objective of DNS, but integrity is. DNSSEC and TSIG/SIG(0) both digitally sign DNS information to authenticate its source and ensure its integrity.

Description

Encrypting information for transmission protects information from unauthorized disclosure and modification. Cryptographic mechanisms implemented to protect information integrity include, for example, cryptographic hash functions which have common application in digital signatures, checksums, and message authentication codes. Confidentiality is not an objective of DNS, but integrity is. DNSSEC and TSIG/SIG(0) both digitally sign DNS information to authenticate its source and ensure its integrity.

STIG	Date
Domain Name System (DNS) Security Requirements Guide	2015-01-05

Details

Check Text ( C-55521r1_chk )
Review the DNS server implementation configuration to determine if the DNS server implements cryptographic mechanisms to detect changes to information during transmission unless otherwise protected by alternative physical safeguards, such as, at a minimum, a Protected Distribution System (PDS). If the DNS server does not implement such cryptographic mechanisms, this is a finding.

Fix Text (F-59757r1_fix)
Configure the DNS server to detect changes to information during transmission unless otherwise protected by alternative physical safeguards, such as, at a minimum, a Protected Distribution Systems (PDS).