03.04.06 Least Functionality
Configure system to provide only essential capabilities; prohibit or restrict use of specified functions, ports, protocols, software, and services.
3
artefacts
1
held by a system
0
at each review
moderate
to go live
Vulnerability scanner / patch tooling
where the evidence lives
teal = a system already holds it · olive = produced at each review
system holds itEvidence a system already holds
- Vulnerability scan output · Vulnerability scanner / patch tooling
periodic reviewEvidence produced at each review
none for this control
governing documentDocuments that govern the control
- Allowed services list · Document repository
- Port/protocol baselines · Document repository
First move
Start with the 1 of 3 artefacts that already live in a system (Vulnerability scanner / patch tooling); keep the periodic reviews but log each one as a dated record with a named reviewer.
Common gaps auditors find
- legacy services left enabled
- default ports open
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 sheet03.04.05 Access Restrictions for Change · 03.04.08 Authorized Software - Allow by Exception