What evidence do auditors commonly ask for on SA-8(31) Security and Privacy Engineering Principles | Secure System Modification?

System and services acquisition policy; Configuration management policy and procedures; Procedures addressing the security design principle of secure system modification used in the specification, design, development, implementation, and modification of the system; System design documentation; System configuration settings and associated documentation; Change control records.

What is the most common gap auditors find on SA-8(31)?

Modifications to the defined systems are made without preserving security

NIST SP 800-53 Rev 5 · SA - System and Services Acquisition

`SA-8(31)` Security and Privacy Engineering Principles | Secure System Modification

Implement the security design principle of secure system modification in organization-defined systems or system components.

Source: NIST SP 800-53 Rev 5, SA-8(31). 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.

artefacts

held by a system

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

Change control records · Document repository

periodic reviewEvidence produced at each review

Test of Organizational processes for applying the security design principle of secure system modification in system specification, design, development, implementation, and modification; mechanisms supporting the application of the security design principle of secure system modification in system specificati · Document repository

governing documentDocuments that govern the control

System and services acquisition policy · Policy repository / GRC workspace
Configuration management policy and procedures · Policy repository / GRC workspace
Procedures addressing the security design principle of secure system modification used in the specification, design, development, implementation, and modification of the system · Policy repository / GRC workspace
System design documentation · Document repository
System configuration settings and associated documentation · Policy repository / GRC workspace
Security and privacy requirements and specifications for the system · Policy repository / GRC workspace
System security and privacy architecture · Policy repository / GRC workspace
System security plan · Policy repository / GRC workspace

First move

Mostly documents and reviews. Pull the 1 system-held artefact from your Document repository 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

Modifications to the defined systems are made without preserving security
No secure modification process governs changes to the defined systems

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

SA-8(30) Security and Privacy Engineering Principles | Procedural Rigor · SA-8(32) Security and Privacy Engineering Principles | Sufficient Documentation