AC-6(9)_log-use-of-privileged-functions

DevOps & Security

Log the execution of privileged functions.

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AC-6(9) Log Use of Privileged Functions

Enhancement of: AC-6

High-Level Description

Family: Access Control (AC) Framework: NIST SP 800-53 Rev 5

The misuse of privileged functions, either intentionally or unintentionally by authorized users or by unauthorized external entities that have compromised system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Logging and analyzing the use of privileged functions is one way to detect such misuse and, in doing so, help mitigate the risk from insider threats and the advanced persistent threat.

What to Check

Verify AC-6(9) Log Use of Privileged Functions is documented in SSP
Confirm control is operating effectively
Review evidence of continuous monitoring for AC-6(9)
Verify enhancement builds upon base control AC-6

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for AC-6(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

Tool	Purpose	Usage
cloud-audit-mcp	Check IAM policies and access controls	`cloud_audit_iam_policies`
hackbrowser-mcp	Test web application access controls	`browser_auth_test`

Remediation Guide

Control Statement

Log the execution of privileged functions.

Implementation Guidance

Risk Assessment

Finding	Severity	Impact
AC-6(9) Log Use of Privileged Functions not implemented	High	Access Control
AC-6(9) partially implemented	Medium	Incomplete Access Control

CWE Categories

CWE ID	Title
CWE-284	Improper Access Control

References

Checklist

Control documented in SSP
Implementation evidence collected
Operating effectiveness validated
Continuous monitoring in place
Related controls (AU-2, AU-3, AU-12) reviewed