Physical devices and systems within the organization are inventoried from Cybersecurity Fundamentals framework

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ID.AM-5: Resources (e.g., hardware, devices, data, time, personnel, and software) are prioritized based on their classification, criticality, and business value

ID.AM-6: Cybersecurity roles, responsibilities, and authorities for the entire workforce and third-party stakeholders are established

Maturity Level 1

Maturity Level 2

Maturity Level 3

ID.AM-1.1

ID.AM-1.1: An inventory of assets associated with information and information processing facilities within the organization shall be documented, reviewed, and updated when changes occur.

This inventory includes fixed and portable computers, tablets, mobile phones, Programmable Logic Controllers (PLCs), sensors, actuators, robots, machine tools, firmware, network switches, routers, power supplies, and other networked components or devices.
This inventory must include all assets, whether or not they are connected to the organization's network.
The use of an IT asset management tool could be considered.

Description

An inventory of assets associated with information and information processing facilities within the organization shall be documented, reviewed, and updated when changes occur.

ID.AM-1.2

ID.AM-1.2: The inventory of assets associated with information and information processing facilities shall reflect changes in the organization’s context and include all information necessary for effective accountability.

Inventory specifications include for example, manufacturer, device type, model, serial number, machine names and network addresses, physical location…
Accountability is the obligation to explain, justify, and take responsibility for one's actions, it implies answerability for the outcome of the task or process.
Changes include the decommissioning of material.

Description

The inventory of assets associated with information and information processing facilities shall reflect changes in the organization’s context and include all information necessary for effective accountability.

ID.AM-1.3

ID.AM-1.3: When unauthorized hardware is detected, it shall be quarantined for possible exception handling, removed, or replaced, and the inventory shall be updated accordingly.

Any unsupported hardware without an exception documentation, is designated as unauthorized.
Unauthorized hardware can be detected during inventory, requests for support by the user or other means.

Description

When unauthorized hardware is detected, it shall be quarantined for possible exception handling, removed, or replaced, and the inventory shall be updated accordingly.

ID.AM-1.4

ID.AM-1.4: Mechanisms for detecting the presence of unauthorized hardware and firmware components within the organization's network shall be identified.

Where safe and feasible, these mechanisms should be automated.
There should be a process to address unauthorized assets on a frequently basis; The organization may choose to remove the asset from the network, deny the asset from connecting remotely to the network, or quarantine the asset.

Description

Mechanisms for detecting the presence of unauthorized hardware and firmware components within the organization's network shall be identified.