SC-41—Port and I/O Device Access
IL6
>Control Description
☑Physically; Logically disable or remove ⚙organization-defined connection ports or input/output devices on the following systems or system components: ⚙organization-defined systems or system components.
>DoD Impact Level Requirements
No specific parameter values or requirements for this impact level.
>Discussion
Connection ports include Universal Serial Bus (USB), Thunderbolt, and Firewire (IEEE 1394). Input/output (I/O) devices include compact disc and digital versatile disc drives. Disabling or removing such connection ports and I/O devices helps prevent the exfiltration of information from systems and the introduction of malicious code from those ports or devices.
Physically disabling or removing ports and/or devices is the stronger action.
>Related Controls
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What policies govern the implementation of port and i/o device access?
- •How are system and communications protection requirements defined and maintained?
- •Who is responsible for configuring and maintaining the security controls specified in SC-41?
Technical Implementation:
- •How is port and i/o device access technically implemented in your environment?
- •What systems, tools, or configurations enforce this protection requirement?
- •How do you ensure that port and i/o device access remains effective as the system evolves?
Evidence & Documentation:
- •What documentation demonstrates the implementation of SC-41?
- •Can you provide configuration evidence or system diagrams showing this protection control?
- •What logs or monitoring data verify that this control is functioning correctly?
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