NIST SP 800-53 Rev. 5 SI-2(4) — Automated Patch Management Tools

What this control requires

Employ automated patch management tools to facilitate flaw remediation for system components. Using these tools helps ensure the timeliness and completeness of system patching operations. This control supports the Automated Patch Management Tools capability within the System and Information Integrity family.

In plain English

Employ automated patch management tools to facilitate flaw remediation for system components. In practice, this means you can prove you policy management-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 System and Information Integrity, the assessor will trace your implementation back to the catalogue reference (Control SI-2(4)) and look for objective evidence on the latest two assessment cycles.

How to implement

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.
• Information. Document the trigger, the owner and the cadence.
• System. Document the trigger, the owner and the cadence.
• Control. Document the trigger, the owner and the cadence.
• Risk. Document the trigger, the owner and the cadence.
• Scope: management, information, system, components, capability, operations, tools, system components.

Evidence to collect

• Policy Document. A signed and version-controlled policy / standard / procedure document.

Signed policy or standard documents the safeguard. Focus: Automated Patch Management Tools.

Common pitfalls

• 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.

• HIPAA (45 CFR Part 164) 164.312(e)(2)(i) — Transmission Security - Integrity Controls
• ISO/IEC 27001:2022 A.5.13 — Labelling of information

Related controls in NIST SP 800-53 Rev. 5

• Control SI-7(12) — Integrity Verification
• Control SI-2(6) — Removal Of Previous Versions Of Software And Firmware
• Control SI-8(2) — Automatic Updates
• Control SI-7(16) — Time Limit On Process Execution Without Supervision
• Control SI-2(3) — Time To Remediate Flaws And Benchmarks For Corrective Actions
• Control SI-4(1) — System-Wide Intrusion Detection System

References

• NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
• Catalogue identifier: Control SI-2(4)

Topics: governance riskpatch managementpolicy management