NIST SP 800-171 Rev 2 · 3.4 Configuration Management

3.4.5 Access restrictions for change

Define, document, approve, and enforce physical and logical access restrictions associated with changes to organizational systems.

SPRS weight: 5; 5 points deducted from 110 when not implemented.
CMMC level: L2; Level 2 only; not among the 17 Level 1 practices.
Assessment objectives: 8; From NIST SP 800-171A, each one a “determine if” an assessor answers.

What an assessor checks

NIST SP 800-171A breaks 3.4.5 into 8 objectives. Every one has to be met for the requirement to be met; a partial answer scores as not implemented.

[a]Determine if physical access restrictions associated with changes to the system are defined.
[b]Determine if physical access restrictions associated with changes to the system are documented.
[c]Determine if physical access restrictions associated with changes to the system are approved.
[d]Determine if physical access restrictions associated with changes to the system are enforced.
[e]Determine if logical access restrictions associated with changes to the system are defined.
[f]Determine if logical access restrictions associated with changes to the system are documented.
[g]Determine if logical access restrictions associated with changes to the system are approved.
[h]Determine if logical access restrictions associated with changes to the system are enforced.

Examine: [SELECT FROM: Configuration management policy; procedures addressing access restrictions for changes to the system; security plan; configuration management plan; system design documentation; system architecture and configuration documentation; system configuration settings and associated documentation; logical access approvals; physical access approvals; access credentials; change control records; system audit logs and records; other relevant documents or records].
Interview: [SELECT FROM: Personnel with logical access control responsibilities; personnel with physical access control responsibilities; personnel with information security responsibilities; system or network administrators].
Test: [SELECT FROM: Organizational processes for managing access restrictions associated with changes to the system; mechanisms supporting, implementing, and enforcing access restrictions associated with changes to the system].

Not POA&M-eligible: above the 1-point ceiling · 5 points deducted

Worth 5 points. No requirement over 1 point may appear on a Level 2 POA&M, so this has to be closed before the assessment.

A POA&M is only permitted at a score of 88 or above, and closes in one 180-day window. Check a full gap list or compute your score.

Configuration management processes are established Information Protection Processes and Procedures

This page and the MacTech CMMC MCP server render the same dataset. Ask your assistant and it will answer from the methodology, not from memory.

lookup_control 3.4.5
get_assessment_objectives 3.4.5
generate_poam_entries ["3.4.5"]

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