NIST 800-171 3.12.4Develop, document, and periodically update system security plans that describe system boundaries, system environments of operation, how security requirements are implemented, and the relationships with or connections to other systems
Overview
This control requires organizations to develop, document, and periodically update system security plans that describe system boundaries, system environments of operation, how security requirements are implemented, and the relationships with or connections to other systems. It is part of the Security Assessment family and is required for CMMC Level 2 certification. Defense contractors handling CUI must implement this control to protect sensitive information and demonstrate compliance during assessments.
Assessment Objectives
- 1Determine if the organization has defined policies and procedures to develop, document, and periodically update system security plans that describe system boundaries, system environments of operation, how security requirements are implemented, and the relationships with or connections to other systems
- 2Determine if the organization implements mechanisms to develop, document, and periodically update system security plans that describe system boundaries, system environments of operation, how security requirements are implemented, and the relationships with or connections to other systems
- 3Verify that the implementation is consistent with organizational policies and NIST 800-171 requirements
Implementation Guidance
Implement this control by establishing documented policies and procedures, deploying appropriate technical controls, and maintaining evidence of ongoing compliance. Regularly review and test the implementation to ensure effectiveness and address any gaps identified during assessments.
Common Audit Gaps
Related DFARS Clauses
Frequently Asked Questions
What is NIST 800-171 control 3.12.4?
NIST 800-171 control 3.12.4 requires organizations to develop, document, and periodically update system security plans that describe system boundaries, system environments of operation, how security requirements are implemented, and the relationships with or connections to other systems. This control is part of the Security Assessment family and is required for CMMC Level 2 certification.
How do you implement NIST 800-171 3.12.4?
To implement control 3.12.4, establish documented policies, deploy technical controls to develop, document, and periodically update system security plans that describe s, and maintain evidence of compliance. Regular testing and monitoring are essential.
What evidence is needed for NIST 800-171 3.12.4?
Evidence for control 3.12.4 typically includes written policies and procedures, system configuration documentation, audit logs showing enforcement, and records of periodic reviews. Assessors will look for both documentation and technical implementation.
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