Assessment Objective

Determine if:

• SC-20a.
  • SC-20a.[01] additional data origin authentication is provided along with the authoritative name resolution data that the system returns in response to external name/address resolution queries;
  • SC-20a.[02] integrity verification artifacts are provided along with the authoritative name resolution data that the system returns in response to external name/address resolution queries;
• SC-20b.
  • SC-20b.[01] the means to indicate the security status of child zones (and if the child supports secure resolution services) is provided when operating as part of a distributed, hierarchical namespace;
  • SC-20b.[02] the means to enable verification of a chain of trust among parent and child domains when operating as part of a distributed, hierarchical namespace is provided.

Assessment Methods

Examine

• System and communications protection policy
• procedures addressing secure name/address resolution services (authoritative source)
• system design documentation
• system configuration settings and associated documentation
• system security plan
• other relevant documents or records

Interview

• System/network administrators
• organizational personnel with information security responsibilities
• organizational personnel with responsibilities for managing DNS

Test

• Mechanisms supporting and/or implementing secure name/address resolution services

Kwistjonijiet marbuta

• NIST -

  EN: Publications of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, from their electronic versions (OSCAL; SP 800-63-4 from its HTML version, https://pages.nist.gov/800-63-4/). Works of NIST employees are not subject to copyright protection in the United States (17 U.S.C. § 105); the OSCAL content is dedicated to the public domain worldwide (CC0 1.0); outside the United States NIST grants the right to reprint its technical series publications in all formats (NIST copyright statement). Republished courtesy of the National Institute of Standards and Technology; each document names its citation. Divided into sections and converted into the GRCA format, the wording unchanged. Only the versions published by NIST are authoritative.

  DE: Veröffentlichungen des National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, aus ihren elektronischen Fassungen (OSCAL; SP 800-63-4 aus ihrer HTML-Fassung, https://pages.nist.gov/800-63-4/). Werke von NIST-Beschäftigten sind in den USA urheberrechtlich nicht geschützt (17 U.S.C. § 105); die OSCAL-Inhalte sind weltweit gemeinfrei gestellt (CC0 1.0); außerhalb der USA räumt das NIST das Recht ein, seine Technical-Series-Publikationen in allen Formaten neu zu veröffentlichen (Copyright-Hinweis des NIST). „Republished courtesy of the National Institute of Standards and Technology“; jedes Dokument nennt seine Zitierangabe. In Abschnitte aufgeteilt und in das GRCA-Format umgewandelt, der Wortlaut unverändert. Maßgeblich sind allein die vom NIST veröffentlichten Fassungen.