EvidenceSheet
NIST SP 800-53 Rev 5 · SC - System and Communications Protection

SC-41 Port and I/O Device Access

Selection: 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.

Source: NIST SP 800-53 Rev 5, SC-41. The statement above is our statement of the clause, read from the published text and cited so you can check it against the official text, not the instrument verbatim. Open NIST SP 800-53 Rev 5 in the compliance library.

Base controls and their enhancements. Which apply follows the baseline you are assessed against (for example FedRAMP Moderate or High, or the low, moderate and high baselines of SP 800-53B). Text in square brackets is a parameter your organisation sets.

10
artefacts
1
held by a system
1
at each review
hard
to go live
Policy repository / GRC workspace
where the evidence lives
teal = a system already holds it · olive = produced at each review. To go live: easy when half or more of the artefacts are already held by a system, moderate from a quarter to a half, hard below a quarter.

These are the artefacts auditors commonly ask for on this requirement, our guidance rather than text from the standard. Your assessor decides what is sufficient in your context, and asks for samples across the period when a report covers one.

system holds itEvidence a system already holds

  • List of connection ports or input/output devices to be physically disabled or removed on systems or system components · Endpoint management (MDM / EDR)

periodic reviewEvidence produced at each review

  • Test of Mechanisms supporting and/or implementing the disabling of connection ports or input/output devices · Endpoint management (MDM / EDR)

governing documentDocuments that govern the control

  • System and communications protection policy · Policy repository / GRC workspace
  • Access control policy and procedures · Policy repository / GRC workspace
  • Procedures addressing port and input/output device access · Policy repository / GRC workspace
  • System design documentation · Document repository
  • System configuration settings and associated documentation · Policy repository / GRC workspace
  • System architecture · Policy repository / GRC workspace
  • Systems or system components · Document repository
  • System security plan · Policy repository / GRC workspace

First move

Mostly documents and reviews. Pull the 1 system-held artefact from your Endpoint management (MDM / EDR) on a schedule; put the documents under version control with an owner and review date, and log each review as a dated record with a named reviewer.

Common gaps auditors find

Do this for your whole sheet

Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.

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SC-40(4) Wireless Link Protection | Signal Parameter Identification · SC-42 Sensor Capability and Data