CA-3(6)

Requirement

Verify that individuals or systems transferring data between interconnecting systems have the requisite authorizations (i.e., write permissions or privileges) prior to accepting such data.

Discussion

To prevent unauthorized individuals and systems from making information transfers to protected systems, the protected system verifies via independent means whether the individual or system attempting to transfer information is authorized to do so. Verification of the authorization to transfer information also applies to control plane traffic (e.g., routing and DNS) and services (e.g., authenticated SMTP relays).

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: Access control policy; procedures addressing system connections; system and communications protection policy; system interconnection agreements; information exchange security agreements; memoranda of understanding or agreements; service level agreements; non-disclosure agreements; system design documentation; system configuration settings and associated documentation; control assessment report; system audit records; system security plan; privacy plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with responsibilities for managing connections to external systems; network administrators; organizational personnel with information security and privacy responsibilities].

Test

[SELECT FROM: Mechanisms implementing restrictions on external system connections].

ID	Assessment Objectives
CA-03(06)	individuals or systems transferring data between interconnecting systems have the requisite authorizations (i.e., write permissions or privileges) prior to accepting such data.

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