| name | SA-9(2)_identification-of-functions-ports-protocols-and-services |
| description | Require providers of the following external system services to identify the functions, ports, protocols, and other services required for the use of su |
| category | configuration |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","sa-9-2","sa","enhancement"] |
| tech_stack | ["any"] |
| cwe_ids | ["CWE-16"] |
| chains_with | ["CM-6","CM-7"] |
| prerequisites | ["SA-9"] |
| severity_boost | {"CM-6":"Chain with CM-6 for comprehensive security coverage","CM-7":"Chain with CM-7 for comprehensive security coverage"} |
SA-9(2) Identification of Functions, Ports, Protocols, and Services
Enhancement of: SA-9
High-Level Description
Family: System and Services Acquisition (SA)
Framework: NIST SP 800-53 Rev 5
Information from external service providers regarding the specific functions, ports, protocols, and services used in the provision of such services can be useful when the need arises to understand the trade-offs involved in restricting certain functions and services or blocking certain ports and protocols.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for SA-9(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
| Tool | Purpose | Usage |
|---|
| Manual Review | Documentation and interview-based | N/A |
Remediation Guide
Control Statement
Require providers of the following external system services to identify the functions, ports, protocols, and other services required for the use of such services: [organization-defined].
Implementation Guidance
Information from external service providers regarding the specific functions, ports, protocols, and services used in the provision of such services can be useful when the need arises to understand the trade-offs involved in restricting certain functions and services or blocking certain ports and protocols.
Risk Assessment
