PM-32_purposing

PM-32 Purposing

High-Level Description

Family: Program Management (PM) Framework: NIST SP 800-53 Rev 5

Systems are designed to support a specific mission or business function. However, over time, systems and system components may be used to support services and functions that are outside of the scope of the intended mission or business functions. This can result in exposing information resources to unintended environments and uses that can significantly increase threat exposure. In doing so, the systems are more vulnerable to compromise, which can ultimately impact the services and functions for which they were intended. This is especially impactful for mission-essential services and functions. By analyzing resource use, organizations can identify such potential exposures.

What to Check

• Verify PM-32 Purposing is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for PM-32

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for PM-32 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

Analyze [organization-defined] supporting mission essential services or functions to ensure that the information resources are being used consistent with their intended purpose.

Implementation Guidance

Systems are designed to support a specific mission or business function. However, over time, systems and system components may be used to support services and functions that are outside of the scope of the intended mission or business functions. This can result in exposing information resources to unintended environments and uses that can significantly increase threat exposure. In doing so, the systems are more vulnerable to compromise, which can ultimately impact the services and functions for which they were intended. This is especially impactful for mission-essential services and functions. By analyzing resource use, organizations can identify such potential exposures.

Risk Assessment

CWE Categories

References

• NIST SP 800-53 Rev 5 - PM-32
• 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 (CA-7, PL-2, RA-3, RA-9) reviewed