SC-20 Secure Name/Address Resolution Service (Authoritative Source)
System and Communications Protection
Description
a. Provide additional data origin authentication and integrity verification artifacts along with the authoritative name resolution data the system returns in response to external name/address resolution queries; and b. Provide the means to indicate the security status of child zones and (if the child supports secure resolution services) to enable verification of a chain of trust among parent and child domains, when operating as part of a distributed, hierarchical namespace.
Supplemental Guidance
Providing authoritative source information enables external clients, including remote Internet clients, to obtain origin authentication and integrity verification assurances for the host/service name to network address resolution information obtained through the service. Systems that provide name and address resolution services include domain name system (DNS) servers. Additional artifacts include DNS Security Extensions (DNSSEC) digital signatures and cryptographic keys. Authoritative data includes DNS resource records. The means for indicating the security status of child zones include the use of delegation signer resource records in the DNS. Systems that use technologies other than the DNS to map between host and service names and network addresses provide other means to assure the authenticity and integrity of response data.
Enhancements (1)
What NIST adds to this control. Select one to read its statement.
SC-20(02) Data Origin and Integrity
Provide data origin and integrity protection artifacts for internal name/address resolution queries.
Withdrawn by NIST:
- SC-20(01) Child Subspaces, now in SC-20
Patterns that use this control (3)
Grouped by the emphasis each pattern gives it.
Critical (1)
Important (1)
Standard (1)
MITRE ATT&CK Techniques (14)
ATT&CK v16.1Techniques mitigated by this control, mapped via CTID.