SI-4(23)_host-based-devices

DevOps & Security

Implement the following host-based monitoring mechanisms at [organization-defined]: [organization-defined].

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/NIST/SP800-53_rev5/SI_system-and-information-integrity/SI-4(23)_host-based-devices/SKILL.md

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SI-4(23) Host-based Devices

Enhancement of: SI-4

High-Level Description

Family: System and Information Integrity (SI) Framework: NIST SP 800-53 Rev 5

Host-based monitoring collects information about the host (or system in which it resides). System components in which host-based monitoring can be implemented include servers, notebook computers, and mobile devices. Organizations may consider employing host-based monitoring mechanisms from multiple product developers or vendors.

What to Check

Verify SI-4(23) Host-based Devices is documented in SSP
Confirm control is operating effectively
Review evidence of continuous monitoring for SI-4(23)
Verify enhancement builds upon base control SI-4

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for SI-4(23) 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
cloud-audit-mcp	Check integrity monitoring	`cloud_audit_monitoring`
AWS CLI	Review GuardDuty/Inspector	`aws guardduty list-detectors`

Remediation Guide

Control Statement

Implement the following host-based monitoring mechanisms at [organization-defined]: [organization-defined].

Implementation Guidance

Risk Assessment

Finding	Severity	Impact
SI-4(23) Host-based Devices not implemented	High	System and Information Integrity
SI-4(23) partially implemented	Medium	Incomplete System and Information Integrity

CWE Categories

CWE ID	Title
CWE-20	Improper Input Validation

References

Checklist

Control documented in SSP
Implementation evidence collected
Operating effectiveness validated
Continuous monitoring in place
Related controls (AC-18, AC-19) reviewed