SC-4(2)_multilevel-or-periods-processing

SC-4(2) Multilevel or Periods Processing

Enhancement of: SC-4

High-Level Description

Family: System and Communications Protection (SC) Framework: NIST SP 800-53 Rev 5

Changes in processing levels can occur during multilevel or periods processing with information at different classification levels or security categories. It can also occur during serial reuse of hardware components at different classification levels. Organization-defined procedures can include approved sanitization processes for electronically stored information.

What to Check

• Verify SC-4(2) Multilevel or Periods Processing is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for SC-4(2)
• Verify enhancement builds upon base control SC-4

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for SC-4(2) 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

Prevent unauthorized information transfer via shared resources in accordance with [organization-defined] when system processing explicitly switches between different information classification levels or security categories.

Implementation Guidance

Changes in processing levels can occur during multilevel or periods processing with information at different classification levels or security categories. It can also occur during serial reuse of hardware components at different classification levels. Organization-defined procedures can include approved sanitization processes for electronically stored information.

Risk Assessment

CWE Categories

References

• NIST SP 800-53 Rev 5 - SC-4(2)
• 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