id: "CM-07" title: "Least Functionality" family: "CM" family_name: "Configuration Management" sort_id: "cm-07" priority: "P1" implementation_level: "system" enhancements: - cm-7.1 - cm-7.2 - cm-7.3 - cm-7.4 - cm-7.5 - cm-7.6 - cm-7.7 - cm-7.8 - cm-7.9
Configure the system to provide only {{ insert: param, cm-07_odp.01 }} ; and
Prohibit or restrict the use of the following functions, ports, protocols, software, and/or services: {{ insert: param, cm-7_prm_2 }}.
Guidance
Systems provide a wide variety of functions and services. Some of the functions and services routinely provided by default may not be necessary to support essential organizational missions, functions, or operations. Additionally, it is sometimes convenient to provide multiple services from a single system component, but doing so increases risk over limiting the services provided by that single component. Where feasible, organizations limit component functionality to a single function per component. Organizations consider removing unused or unnecessary software and disabling unused or unnecessary physical and logical ports and protocols to prevent unauthorized connection of components, transfer of information, and tunneling. Organizations employ network scanning tools, intrusion detection and prevention systems, and end-point protection technologies, such as firewalls and host-based intrusion detection systems, to identify and prevent the use of prohibited functions, protocols, ports, and services. Least functionality can also be achieved as part of the fundamental design and development of the system (see SA-8, SC-2 , and SC-3).
Assessment Objective: the system is configured to provide only {{ insert: param, cm-07_odp.01 }};
Assessment Objective: the use of {{ insert: param, cm-07_odp.02 }} is prohibited or restricted;
Assessment Objective: the use of {{ insert: param, cm-07_odp.03 }} is prohibited or restricted;
Assessment Objective: the use of {{ insert: param, cm-07_odp.04 }} is prohibited or restricted;
Assessment Objective: the use of {{ insert: param, cm-07_odp.05 }} is prohibited or restricted;
Assessment Objective: the use of {{ insert: param, cm-07_odp.06 }} is prohibited or restricted.
Configuration management policy
procedures addressing least functionality in the system
configuration management plan
system design documentation
system configuration settings and associated documentation
system component inventory
common secure configuration checklists
system security plan
other relevant documents or records
Organizational personnel with security configuration management responsibilities
organizational personnel with information security responsibilities
system/network administrators
system developers
Organizational processes prohibiting or restricting functions, ports, protocols, software, and/or services
mechanisms implementing restrictions or prohibition of functions, ports, protocols, software, and/or services