NIST SP 800-53 Rev. 5 SI-3(6) — Testing And Verification : iCompaas Support

NIST SP 800-53 Rev. 5·Control SI-3(6)·high·Component: System and Information Integrity

What this control requires

Test malicious code protection mechanisms at the organization-defined frequency by introducing known benign code into the system. Verify that the protection mechanisms detect the code and ensure proper incident reporting is triggered as expected. This control supports the Malicious Code Protection Systems capability within the System and Information Integrity family.
— NIST SP 800-53 Rev. 5, Control SI-3(6)

In plain English

Test malicious code protection mechanisms at the organization-defined frequency by introducing known benign code into the system. In practice, this means you can prove you information information-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-3(6)) and look for objective evidence on the latest two assessment cycles.

How to implement

Code Review Testing

Pipeline. Require at least one human reviewer plus passing CI (lint, type, unit, security scan) before merge — protected branches enforce this.

Secure Development

Pipeline. Require code review, SAST (Semgrep / Snyk Code), SCA (Dependabot / Renovate), secret-scanning and IaC scanning in the merge pipeline.

Branch protection. Protected branches enforce reviews, signed commits and passing CI before merge; document the protection rules as the control evidence.

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.

Operational checklist

Information. Document the trigger, the owner and the cadence.
Security. Document the trigger, the owner and the cadence.
Review. Document the trigger, the owner and the cadence.
Protection. Document the trigger, the owner and the cadence.
Response. Document the trigger, the owner and the cadence.
Scope: information, organization, system, application, protection, review, capability, verification.

Evidence to collect

Code Repo Scan. Source-control evidence — branch protection, required reviewers, CI status, SCA / SAST reports.

Source control pipelines (GitHub, GitLab) enforce SDLC guardrails. Focus: Testing And Verification.

Common pitfalls

CI security checks set to warn-only; the merge button is faster than the security feedback.
Runbooks that name a role but no person, or list a paging channel that no longer exists.

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.

NIST SP 800-171 Rev. 3 3.14.2 — Malicious Code Protection

Related controls in NIST SP 800-53 Rev. 5

References

NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
Catalogue identifier: Control SI-3(6)

Topics: application securitysecure developmentcode review testingdevsecopsincident response

NIST SP 800-53 Rev. 5 SI-3(6) — Testing And Verification