IA-9_service-identification-and-authentication

IA-9 Service Identification and Authentication

High-Level Description

Family: Identification and Authentication (IA) Framework: NIST SP 800-53 Rev 5

Services that may require identification and authentication include web applications using digital certificates or services or applications that query a database. Identification and authentication methods for system services and applications include information or code signing, provenance graphs, and electronic signatures that indicate the sources of services. Decisions regarding the validity of identification and authentication claims can be made by services separate from the services acting on those decisions. This can occur in distributed system architectures. In such situations, the identification and authentication decisions (instead of actual identifiers and authentication data) are provided to the services that need to act on those decisions.

What to Check

• Verify IA-9 Service Identification and Authentication is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for IA-9

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for IA-9 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

Uniquely identify and authenticate [organization-defined] before establishing communications with devices, users, or other services or applications.

Implementation Guidance

Services that may require identification and authentication include web applications using digital certificates or services or applications that query a database. Identification and authentication methods for system services and applications include information or code signing, provenance graphs, and electronic signatures that indicate the sources of services. Decisions regarding the validity of identification and authentication claims can be made by services separate from the services acting on those decisions. This can occur in distributed system architectures. In such situations, the identification and authentication decisions (instead of actual identifiers and authentication data) are provided to the services that need to act on those decisions.

Risk Assessment

CWE Categories

References

• NIST SP 800-53 Rev 5 - IA-9
• 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 (IA-3, IA-4, IA-5, IA-13, SC-8) reviewed