CM-7 Least Functionality
Removes supplier-included functionality that the organization does not need and that widens the attack surface.
3
artefacts
0
held by a system
2
at each review
hard
to go live
Document repository
where the evidence lives
teal = a system already holds it · olive = produced at each review
system holds itEvidence a system already holds
none for this control
periodic reviewEvidence produced at each review
- Review of delivered functionality against need · Document repository
- Records of functions and services disabled · Document repository
governing documentDocuments that govern the control
- Acquisition requirements limiting bundled functionality · Document repository
First move
This control is evidenced by people and documents, not systems. Put the document under version control with an owner and review date, and log each review as a record with reviewer and date. Do not try to automate it.
Common gaps auditors find
- vendor bundles left enabled because disabling is unsupported
- review performed for software but not firmware
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.
Build my evidence sheetCM-6 Configuration Settings · CM-8 System Component Inventory