Least Privilege – Privileged Functions (03.01.07)_least-privilege-privileged-functions

DevOps & Security

Prevent non-privileged users from executing privileged functions.

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/NIST/SP800-171_rev3/03.01_access-control/Least%20Privilege%20%E2%80%93%20Privileged%20Functions%20(03.01.07)_least-privilege-privileged-functions/SKILL.md

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Least Privilege – Privileged Functions (03.01.07) Least Privilege – Privileged Functions

High-Level Description

Family: Access Control Framework: NIST SP 800-171 Rev 3 Applicability: Systems processing, storing, or transmitting CUI

Prevent non-privileged users from executing privileged functions. Log the execution of privileged functions.

What to Check

Verify Least Privilege – Privileged Functions (03.01.07) Least Privilege – Privileged Functions is implemented for CUI systems
Review SSP documentation for Least Privilege – Privileged Functions (03.01.07)
Validate CMMC Level 2 assessment objective for Least Privilege – Privileged Functions (03.01.07)
Confirm POA&M addresses any gaps for Least Privilege – Privileged Functions (03.01.07)

How to Test

Step 1: Review System Security Plan

Examine the SSP for Least Privilege – Privileged Functions (03.01.07) implementation description and responsible parties.

Step 2: Assess Implementation

# Verify security controls protecting CUI
# Check access controls, encryption, monitoring as applicable

# For Linux systems:
ls -la /etc/security/ 2>/dev/null
grep -r "CUI\|controlled" /etc/security/ 2>/dev/null

# For cloud:
# Use cloud-audit-mcp tools to assess posture

Step 3: CMMC Assessment Validation

Verify this requirement passes CMMC Level 2 assessment methodology per SP 800-171A Rev 3.

Tools

Tool	Purpose	Usage
cloud-audit-mcp	Assess cloud CUI environment	`cloud_audit_*` tools
Manual Review	SSP and POA&M review	Documentation analysis

Remediation Guide

Requirement Statement

Prevent non-privileged users from executing privileged functions. Log the execution of privileged functions.

Supplemental Guidance

Privileged functions include establishing system accounts, performing system integrity checks, conducting patching operations, changing system configuration settings, or administering cryptographic key management activities. Non-privileged users do not possess the authorizations to execute privileged functions. Bypassing intrusion detection and prevention mechanisms or malicious code protection mechanisms are examples of privileged functions that require protection from non-privileged users. This requirement represents a condition achieved by the definition of authorized privileges in 03.01.01 and privilege enforcement in 03.01.02. The misuse of privileged functions — whether intentionally or unintentionally by authorized users or by unauthorized external entities that have compromised system accounts — is a serious and ongoing concern that can have significant adverse impacts on organizations. Logging the use of privileged functions is one way to detect such misuse and mitigate risks from advanced persistent threats and insider threats.

Risk Assessment

Finding	Severity	Impact
Least Privilege – Privileged Functions (03.01.07) Least Privilege – Privileged Functions not implemented	High	CUI Protection - Access Control
Least Privilege – Privileged Functions (03.01.07) partially implemented (POA&M)	Medium	CMMC certification risk

CWE Categories

CWE ID	Title
CWE-284	Improper Access Control

References

Checklist

SSP documents Least Privilege – Privileged Functions (03.01.07) implementation
Evidence of operating effectiveness collected
POA&M addresses any gaps
CMMC assessment objective met
Continuous monitoring active