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  1. Frameworks
  2. >C2M2
  3. >Cybersecurity Architecture
  4. >Cybersecurity Architecture - Objective 3
  5. >C2M2-ARCHITECTURE-3D
C2M2-ARCHITECTURE-3DActive

The principle of least functionality (for example, limiting services, limiting applications, limiting ports, limiting connected devices) is enforced

Statement

The principle of least functionality (for example, limiting services, limiting applications, limiting ports, limiting connected devices) is enforced

Location

Domain
Cybersecurity Architecture
Objective
Cybersecurity Architecture - Objective 3

Practice Details

Identifier
C2M2-ARCHITECTURE-3D
Domain
Cybersecurity Architecture
Objective
Objective 3
Maturity Level
MIL-2

Help Text

Assets should be configured to provide only essential capabilities and to restrict unnecessary functionality. For example, if a system is configured to operate as an email server, ports not associated with this service should be closed and applications/services should be disabled if they do not support the sending and receiving of email.

Related Practices · Progression: This practice is part of a practice progression. Practice progressions are groups of related practices that represent increasingly complete or more advanced implementations of an activity. The practices in this progression include: ARCHITECTURE-3a, ARCHITECTURE-3b, ARCHITECTURE-3c, ARCHITECTURE-3d, ARCHITECTURE-3h, ARCHITECTURE-3k.

AESCSF
AESCSF-ARCHITECTURE-3dequivalentvia derived-shared-practice-structure
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← Back to Cybersecurity Architecture - Objective 3
Cybersecurity Architecture - Objective 313 controls
C2M2-ARCHITECTURE-3ALogical and physical access controls are implemented to protect assets that are important to the delivery of the function, where feasible, at least in an ad hoc mannerC2M2-ARCHITECTURE-3BEndpoint protections (such as secure configuration, security applications, and host monitoring) are implemented to protect assets that are important to the delivery of the function, where feasible, at least in an ad hoc mannerC2M2-ARCHITECTURE-3CThe principle of least privilege (for example, limiting administrative access for users and service accounts) is enforcedC2M2-ARCHITECTURE-3DThe principle of least functionality (for example, limiting services, limiting applications, limiting ports, limiting connected devices) is enforcedC2M2-ARCHITECTURE-3ESecure configurations are established and maintained as part of the asset deployment process where feasibleC2M2-ARCHITECTURE-3FSecurity applications are required as an element of device configuration where feasible (for example, endpoint detection and response, host-based firewalls)C2M2-ARCHITECTURE-3GThe use of removeable media is controlled (for example, limiting the use of USB devices, managing external hard drives)C2M2-ARCHITECTURE-3HCybersecurity controls are implemented for all assets within the function either at the asset level or as compensating controls where asset-level controls are not feasibleC2M2-ARCHITECTURE-3IMaintenance and capacity management activities are performed for all assets within the functionC2M2-ARCHITECTURE-3JThe physical operating environment is controlled to protect the operation of assets within the functionC2M2-ARCHITECTURE-3KMore rigorous cybersecurity controls are implemented for higher priority assetsC2M2-ARCHITECTURE-3LConfiguration of and changes to firmware are controlled throughout the asset lifecycleC2M2-ARCHITECTURE-3MControls (such as allowlists, blocklists, and configuration settings) are implemented to prevent the execution of unauthorized code