NIST SP 800-53 Rev. 5 MA-3(1) — Inspect Tools : iCompaas Support

NIST SP 800-53 Rev. 5·Control MA-3(1)·high·Component: Maintenance

What this control requires

Inspect Maintenance tools brought by personnel or downloaded from vendors for improper or unauthorized modifications. If any modifications or malicious code are detected, the incident is handled according to organizational policies and procedures for incident response. This control supports the Tool Inspection capability within the Maintenance family.
— NIST SP 800-53 Rev. 5, Control MA-3(1)

In plain English

Inspect Maintenance tools brought by personnel or downloaded from vendors for improper or unauthorized modifications. In practice, this means you can prove you policy procedures-level controls on a defined cadence.

Why it matters

SP 800-53 is the catalogue every U.S. federal authorisation (FedRAMP, FISMA, CMMC) and most regulated industries point at. A missing control surfaces as a Plan of Action & Milestones (POA&M) item that an Authorizing Official must approve before the Authority To Operate is granted or renewed.

This control is rated high. Auditors expect a named owner, a remediation SLA, and a tooling artefact that evidences continuous operation.

What an auditor looks for

A 3PAO (FedRAMP) or Independent Assessor (NIST RMF) tests against NIST SP 800-53A assessment procedures. For each control they expect a documented implementation that addresses every assessment objective (Examine, Interview, Test) and an implementation summary in the System Security Plan.

Within Maintenance, the assessor will trace your implementation back to the catalogue reference (Control MA-3(1)) and look for objective evidence on the latest two assessment cycles.

How to implement

Incident Response

Runbook. Maintain a runbook keyed by incident type with named roles (IC, comms, scribe), an out-of-band comms channel, and a 72-hour timeline for external notification.

Tabletop. Run a quarterly tabletop exercise (ransomware, insider, supply-chain) and feed gaps back into the runbook.

Policy Management

Docs. Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA.

Operational checklist

Policy. Document the trigger, the owner and the cadence.
Security. Document the trigger, the owner and the cadence.
Maintenance. Document the trigger, the owner and the cadence.
Response. Document the trigger, the owner and the cadence.
Chain. Document the trigger, the owner and the cadence.
Scope: procedures, management, inspection, personnel, maintenance, capability, tools, security policy.

Evidence to collect

Vendor Risk Management. vendor_risk_management evidence
Policy Document. A signed and version-controlled policy / standard / procedure document.

Third-party risk management evidence (assessments, contracts, due diligence) shows supplier oversight. Signed policy or standard documents the safeguard. Focus: Inspect Tools.

Common pitfalls

Runbooks that name a role but no person, or list a paging channel that no longer exists.
Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

Related controls in NIST SP 800-53 Rev. 5

References

NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
Catalogue identifier: Control MA-3(1)

Topics: governance riskvendor riskvendor managementincident responsesupply chain securitypolicy management

NIST SP 800-53 Rev. 5 MA-3(1) — Inspect Tools