CM.L2-3.4.2 Security Configuration Enforcement

CMMC Practice CM.L2-3.4.2 – Security Configuration Enforcement: Establish and enforce security configuration settings for information technology products employed in organizational systems.

Links to Publicly Available Resources

Discussion [NIST SP 800-171 R2]
Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture or functionality of the system. Information technology products for which security-related configuration settings can be defined include mainframe computers, servers, workstations, input and output devices (e.g., scanners, copiers, and printers), network components (e.g., firewalls, routers, gateways, voice and data switches, wireless access points, network appliances, sensors), operating systems, middleware, and applications.
Security parameters are those parameters impacting the security state of systems including the parameters required to satisfy other security requirements. Security parameters include: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, and remote connections. Organizations establish organization-wide configuration settings and subsequently derive specific configuration settings for systems. The established settings become part of the systems configuration baseline.
Common secure configurations (also referred to as security configuration checklists, lockdown and hardening guides, security reference guides, security technical implementation guides) provide recognized, standardized, and established benchmarks that stipulate secure configuration settings for specific information technology platforms/products and instructions for configuring those system components to meet operational requirements. Common secure configurations can be developed by a variety of organizations including information technology product developers, manufacturers, vendors, consortia, academia, industry, federal agencies, and other organizations in the public and private sectors.
NIST SP 800-70 and SP 800-128 provide guidance on security configuration settings.

Further Discussion
Information security is an integral part of a company’s configuration management process. Security-related configuration settings are customized to satisfy the company’s security requirements and are applied them to all systems once tested and approved. The configuration settings must reflect the most restrictive settings that are appropriate for the system. Any required deviations from the baseline are reviewed, documented, and approved.