NIST SP 800-171 Rev 2 · 3.4 Configuration Management

3.4.9 Control user-installed software

Control and monitor user-installed software.

SPRS weight: 1; 1 point deducted from 110 when not implemented.
CMMC level: L2; Level 2 only; not among the 17 Level 1 practices.
Assessment objectives: 3; From NIST SP 800-171A, each one a “determine if” an assessor answers.

What an assessor checks

NIST SP 800-171A breaks 3.4.9 into 3 objectives. Every one has to be met for the requirement to be met; a partial answer scores as not implemented.

[a]Determine if a policy for controlling the installation of software by users is established.
[b]Determine if installation of software by users is controlled based on the established policy.
[c]Determine if installation of software by users is monitored.

Examine: [SELECT FROM: Configuration management policy; procedures addressing user installed software; configuration management plan; security plan; system design documentation; system configuration settings and associated documentation; list of rules governing user-installed software; system monitoring records; system audit logs and records; continuous monitoring strategy; other relevant documents or records].
Interview: [SELECT FROM: Personnel with responsibilities for governing user-installed software; personnel operating, using, or maintaining the system; personnel monitoring compliance with user-installed software policy; personnel with information security responsibilities; system or network administrators].
Test: [SELECT FROM: Organizational processes governing user-installed software on the system; mechanisms enforcing rules or methods for governing the installation of software by users; mechanisms monitoring policy compliance].

May be carried on a Level 2 POA&M · 1 point deducted

A 1-point requirement outside the six named exclusions - eligible to carry, and NOT MET until a closeout assessment confirms it.

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.

Assets are identified and inventoried Asset Management
Configuration management processes are established Information Protection Processes and Procedures

No direct mapping.

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 3.4.9
get_assessment_objectives 3.4.9
generate_poam_entries ["3.4.9"]

From MacZine