What evidence do auditors commonly ask for on PW.4.1 Reuse Trusted Software Components?

Approved component catalog; Component intake review process; Provenance verification logs; Deprecation process for risky components.

What is the most common gap auditors find on PW.4.1?

no central catalog of approved components

NIST SP 800-218 (SSDF) · Produce Well Secured Software

`PW.4.1` Reuse Trusted Software Components

Acquire and reuse well secured software components rather than creating new ones for common functions. Track the origin and version of each component and verify its provenance.

Source: NIST SP 800-218 (SSDF), PW.4.1. 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 800-218 (SSDF) in the compliance library.

artefacts

held by a system

at each review

moderate

to go live

SIEM / log platform

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

Provenance verification logs · SIEM / log platform

periodic reviewEvidence produced at each review

none for this control

governing documentDocuments that govern the control

Approved component catalog · Document repository
Component intake review process · Document repository
Deprecation process for risky components · Document repository

First move

Start with the 1 of 4 artefacts that already live in a system (SIEM / log platform); keep the periodic reviews but log each one as a dated record with a named reviewer.

Common gaps auditors find

no central catalog of approved components
intake review skipped under time pressure
components remain in use after the upstream project is abandoned

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 sheet

PW.2.1 Qualified Review of Software Design · PW.4.2 Maintain Well-Secured In-House Components