CA-3(5)_restrictions-on-external-system-connections

CA-3(5) Restrictions on External System Connections

Enhancement of: CA-3

High-Level Description

Family: Assessment, Authorization, and Monitoring (CA) Framework: NIST SP 800-53 Rev 5

No description available.

What to Check

• Verify CA-3(5) Restrictions on External System Connections is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for CA-3(5)
• Verify enhancement builds upon base control CA-3

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for CA-3(5) 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

Refer to NIST SP 800-53 Rev 5 for the full control statement.

Implementation Guidance

Implement this control per organizational risk assessment and system categorization.

Risk Assessment

CWE Categories

References

• NIST SP 800-53 Rev 5 - CA-3(5)
• 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