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MA-4(3)—Nonlocal Maintenance | Comparable Security and Sanitization

IL4 High
IL5
IL6

>Control Description

(a) Require that nonlocal maintenance and diagnostic services be performed from a system that implements a security capability comparable to the capability implemented on the system being serviced; or (b) Remove the component to be serviced from the system prior to nonlocal maintenance or diagnostic services; sanitize the component (for organizational information); and after the service is performed, inspect and sanitize the component (for potentially malicious software) before reconnecting the component to the system.

>DoD Impact Level Requirements

No specific parameter values or requirements for this impact level.

>Discussion

Comparable security capability on systems, diagnostic tools, and equipment providing maintenance services implies that the implemented controls on those systems, tools, and equipment are at least as comprehensive as the controls on the system being serviced.

>Related Controls

MP-6
SI-3
SI-7

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • •What formal policies and procedures govern the implementation of MA-4(3) (Comparable Security And Sanitization)?
  • •Who are the designated roles responsible for implementing, maintaining, and monitoring MA-4(3)?
  • •How frequently is the MA-4(3) policy reviewed and updated, and what triggers policy changes?
  • •What governance structure ensures MA-4(3) requirements are consistently applied across all systems?

Technical Implementation:

  • •Describe the specific technical mechanisms or controls used to enforce MA-4(3) requirements.
  • •What automated tools, systems, or technologies are deployed to implement MA-4(3)?
  • •How is MA-4(3) integrated into your system architecture and overall security posture?
  • •What configuration settings, parameters, or technical specifications enforce MA-4(3) requirements?

Evidence & Documentation:

  • •What documentation demonstrates the complete implementation of MA-4(3)?
  • •What audit logs, records, reports, or monitoring data validate MA-4(3) compliance?
  • •Can you provide evidence of periodic reviews, assessments, or testing of MA-4(3) effectiveness?
  • •What artifacts would you present during a FedRAMP assessment to demonstrate MA-4(3) compliance?

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