03.04.06 Least Functionality

Statement

• a. Configure the system to provide only mission-essential capabilities.

• b. Prohibit or restrict use of the following functions, ports, protocols, connections, and services: {{ insert: param, A.03.04.06.ODP.01 }} .

• c. Review the system {{ insert: param, A.03.04.06.ODP.06 }} to identify unnecessary or nonsecure functions, ports, protocols, connections, and services.

• d. Disable or remove functions, ports, protocols, connections, and services that are unnecessary or nonsecure.

Guidance

Systems can provide a variety of functions and services. Some functions and services that are routinely provided by default may not be necessary to support essential organizational missions, functions, or operations. It may be convenient to provide multiple services from single system components. However, doing so increases risk over limiting the services provided by any one component. Where feasible, organizations limit functionality to a single function per component. Organizations review the functions and services provided by the system or system components to determine which functions and services are candidates for elimination. Organizations disable unused or unnecessary physical and logical ports and protocols to prevent the unauthorized connection of devices, the transfer of information, and tunneling. Organizations can employ network scanning tools, intrusion detection and prevention systems, and endpoint protection systems (e.g., firewalls and host-based intrusion detection systems) to identify and prevent the use of prohibited functions, ports, protocols, system connections, and services. Bluetooth, File Transfer Protocol (FTP), and peer-to-peer networking are examples of the types of protocols that organizations consider eliminating, restricting, or disabling.

Assessment objective

the use of the following functions is prohibited or restricted: {{ insert: param, A.03.04.06.ODP.01 }}.

Assessment objective

the use of the following ports is prohibited or restricted: {{ insert: param, A.03.04.06.ODP.02 }}.

Assessment objective

the use of the following protocols is prohibited or restricted: {{ insert: param, A.03.04.06.ODP.03 }}.

Assessment objective

the use of the following connections is prohibited or restricted: {{ insert: param, A.03.04.06.ODP.04 }}.

Assessment objective

the use of the following services is prohibited or restricted: {{ insert: param, A.03.04.06.ODP.05 }}.

Assessment objective

the system is reviewed {{ insert: param, A.03.04.06.ODP.06 }} to identify unnecessary or nonsecure functions, ports, protocols, connections, and services.

Assessment objective

unnecessary or nonsecure functions, ports, protocols, connections, and services are disabled or removed.

Assessment objective

the system is configured to provide only mission-essential capabilities.

Assessment method

• configuration management policy and procedures procedures for least functionality in the system configuration management plan system design documentation system configuration settings system component inventory common secure configuration checklists documented reviews of functions, ports, protocols, and services change control records system audit records system security plan other relevant documents or records

Assessment method

• personnel with configuration management responsibilities personnel with responsibilities for reviewing functions, ports, protocols, and services personnel with information security responsibilities system developers system administrators

Assessment method

• processes for prohibiting or restricting functions, ports, protocols, and services processes for reviewing or disabling functions, ports, protocols, and services mechanisms for implementing the review and disabling of functions, ports, protocols, and services mechanisms for implementing restrictions on or the prohibition of functions, ports, protocols, and services

1. Panoramica

1.1 Riferimenti

1.2 Requisiti identificati

1.3 Regolamentazioni correlate

2. Requisiti identificati

3. Regolamentazioni correlate

Ticket collegati

• NIST -

  EN: Publications of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, from their electronic versions (OSCAL; SP 800-63-4 from its HTML version, https://pages.nist.gov/800-63-4/). Works of NIST employees are not subject to copyright protection in the United States (17 U.S.C. § 105); the OSCAL content is dedicated to the public domain worldwide (CC0 1.0); outside the United States NIST grants the right to reprint its technical series publications in all formats (NIST copyright statement). Republished courtesy of the National Institute of Standards and Technology; each document names its citation. Divided into sections and converted into the GRCA format, the wording unchanged. Only the versions published by NIST are authoritative.

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