cyberstrikeus MA-5(3) Citizenship Requirements for Classified Systems
Enhancement of: MA-5
High-Level Description
Family: Maintenance (MA) Framework: NIST SP 800-53 Rev 5
Personnel who conduct maintenance on organizational systems may be exposed to classified information during the course of their maintenance activities. If access to classified information on organizational systems is restricted to U.S. citizens, the same restriction is applied to personnel performing maintenance on those systems.
What to Check
- Verify MA-5(3) Citizenship Requirements for Classified Systems is documented in SSP
- Confirm control is operating effectively
- Review evidence of continuous monitoring for MA-5(3)
- Verify enhancement builds upon base control MA-5
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for MA-5(3) implementation details. Verify the organization has documented how this control is satisfied.
Step 2: Validate Implementation
# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly
# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null
Step 3: Test Operating Effectiveness
Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.
Tools
| Tool | Purpose | Usage |
|---|---|---|
| Manual Review | Documentation and interview-based | N/A |
Remediation Guide
Control Statement
Verify that personnel performing maintenance and diagnostic activities on a system processing, storing, or transmitting classified information are U.S. citizens.
Implementation Guidance
Personnel who conduct maintenance on organizational systems may be exposed to classified information during the course of their maintenance activities. If access to classified information on organizational systems is restricted to U.S. citizens, the same restriction is applied to personnel performing maintenance on those systems.
Risk Assessment
| Finding | Severity | Impact |
|---|---|---|
| MA-5(3) Citizenship Requirements for Classified Systems not implemented | Medium | Maintenance |
| MA-5(3) partially implemented | Low | Incomplete Maintenance |
CWE Categories
| CWE ID | Title |
|---|---|
| N/A | No direct CWE mapping |
References
- NIST SP 800-53 Rev 5 - MA-5(3)
- NIST SP 800-53A Rev 5 (Assessment Procedures)
- NIST SP 800-53 Rev 5 Full Catalog
Checklist
- Control documented in SSP
- Implementation evidence collected
- Operating effectiveness validated
- Continuous monitoring in place
- Related controls (PS-3) reviewed