CM-7(7)·medium·Component: Configuration ManagementWhat this control requires
Organizations periodically review systems to identify and disable or remove unnecessary or nonsecure functions, ports, protocols, software, and services. Conducted at an organization-defined frequency, this review minimizes the attack surface by eliminating unsecure elements (e.g., Bluetooth, FTP) and ensuring minimal functionality, especially during technology transitions like IPv4 to IPv6. This control supports the Network Scanner capability within the Configuration Management family.
In plain English
Organizations periodically review systems to identify and disable or remove unnecessary or nonsecure functions, ports, protocols, software, and services. In practice, this means you can prove you disable 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.
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 Configuration Management, the assessor will trace your implementation back to the catalogue reference (Control CM-7(7)) and look for objective evidence on the latest two assessment cycles.
How to implement
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.
Code Review Testing
Pipeline. Require at least one human reviewer plus passing CI (lint, type, unit, security scan) before merge — protected branches enforce this.
Operational checklist
- Disable. Document the trigger, the owner and the cadence.
- Security. Document the trigger, the owner and the cadence.
- Configuration. Document the trigger, the owner and the cadence.
- Network. Document the trigger, the owner and the cadence.
- Review. Document the trigger, the owner and the cadence.
- Scope: management, organization, application, functions, e, configuration, software, environments.
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: Code Execution In Protected Environments.
Common pitfalls
- CI security checks set to warn-only; the merge button is faster than the security feedback.
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
- Control CM-14 — Signed Components
- Control SA-10(5) — Mapping Integrity For Version Control
- Control CM-7(5) — Authorized Software -- Allow-By-Exception
- Control SC-18(5) — Allow Execution Only In Confined Environments
- Control CM-8(7) — Centralized Repository
- Control AC-6(8) — Privilege Levels For Code Execution
References
- NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
- Catalogue identifier:
Control CM-7(7)
Topics: application securitysecure developmentcode review testingdevsecops