MA-4(4)_authentication-and-separation-of-maintenance-sessions

MA-4(4) Authentication and Separation of Maintenance Sessions

Enhancement of: MA-4

High-Level Description

Family: Maintenance (MA) Framework: NIST SP 800-53 Rev 5

Communications paths can be logically separated using encryption.

What to Check

• Verify MA-4(4) Authentication and Separation of Maintenance Sessions is documented in SSP
• Validate all 3 control requirements are implemented
• Confirm control is operating effectively
• Review evidence of continuous monitoring for MA-4(4)
• Verify enhancement builds upon base control MA-4

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for MA-4(4) 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

Remediation Guide

Control Statement

Protect nonlocal maintenance sessions by: Employing [organization-defined] ; and Separating the maintenance sessions from other network sessions with the system by either: Physically separated communications paths; or Logically separated communications paths.

Implementation Guidance

Communications paths can be logically separated using encryption.

Risk Assessment

CWE Categories

References

• NIST SP 800-53 Rev 5 - MA-4(4)
• 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 (none) reviewed