Configuration Management Plan

A Configuration Management Plan (CM Plan) is the document auditors use to understand whether you control what’s running in your environment, who can change it, and how you prevent “configuration drift” from breaking security or compliance expectations. Under NIST SP 800-53 Rev. 5 control CM-9, you must “develop, document, and implement” a plan for the system that addresses roles, responsibilities, and configuration management processes and procedures. ¹

For a Compliance Officer, CCO, or GRC lead, the fastest path is to treat the CM Plan as an operating manual that connects governance (who approves), engineering (how changes happen), and assurance (what evidence proves it). The plan needs to cover your configuration baselines, how changes are requested and reviewed, what gets tested, how emergency changes are handled, and how you track configuration items over time. It also needs to reflect reality: your CI/CD pipeline, infrastructure-as-code, cloud control plane settings, endpoint hardening, and any third party-managed components.

This page gives requirement-level guidance you can hand to engineering and still own as compliance: scope, minimum contents, step-by-step implementation, evidence to retain, and the audit questions that commonly derail teams.

Regulatory text

Requirement (CM-9): “Develop, document, and implement a configuration management plan for the system that addresses roles, responsibilities, and configuration management processes and procedures.” ¹

What the operator must do:

• Develop: write a CM Plan that is specific to the system boundary you are authorizing or assessing.
• Document: make it controlled (versioned, approved, accessible, and kept current).
• Implement: run the processes described, using real workflows and tools, and retain evidence that the processes operate as written. ¹

Plain-English interpretation

You need a single source of truth that answers four questions:

1. What counts as “configuration” for this system? (assets, services, images, policies, SaaS settings, network rules, code-driven infrastructure, endpoints)
2. Who can propose, approve, and implement changes? (roles, decision rights, segregation of duties where applicable)
3. How do changes move from idea to production? (intake, risk review, testing, approvals, implementation, rollback, documentation)
4. How do you prove control over time? (baselines, monitoring for drift, periodic review, exceptions, and metrics)

A CM Plan that reads like a policy but doesn’t connect to tickets, pull requests, pipeline controls, and cloud logs fails in practice.

Who it applies to (entity and operational context)

Applies to:

• Cloud Service Providers (CSPs) operating systems within a defined authorization boundary (for example, FedRAMP Moderate-aligned environments). ¹
• Federal Agencies operating or sponsoring systems where configuration changes can affect confidentiality, integrity, or availability. ¹

Operational contexts to assume in scope:

• Cloud infrastructure: IAM policies, security groups/firewalls, logging settings, storage access controls, encryption configurations.
• Compute and platform: golden images, container base images, Kubernetes policies, OS hardening settings.
• Applications: feature flags, app config stores, secrets management configuration, dependency version controls.
• Tooling: CI/CD configuration, source control protections, artifact repositories.
• Third parties: managed databases, monitoring providers, outsourced SOC, and any third party with admin access or configuration responsibility.

What you actually need to do (step-by-step)

1) Define CM Plan scope and boundaries

• Identify the system boundary and major components (prod, staging, shared services that are in-boundary).
• Define configuration item (CI) categories you control (infrastructure, platform, application, security tooling, identity, network).
• Document what’s explicitly out of scope and why (and where it is controlled instead).

Output: CM Plan scope section; system component inventory pointer (do not duplicate if you already have a CMDB or asset inventory).

2) Assign roles, responsibilities, and decision rights

Minimum roles to name (titles can vary):

• Configuration Management Owner (accountable for the plan and audits)
• Change Approvers (CAB or delegated approvers by service)
• Implementers (engineering/SRE)
• Security Reviewer (for security-impacting changes)
• Emergency Change Authority
• Third party contacts (for managed components and support escalation)

Make decision rights explicit: who can approve routine changes vs high-risk changes; who can override in emergencies; who records the final configuration state.

Output: RACI matrix embedded in the CM Plan.

3) Document your configuration baselines

Auditors expect you to define “known good” states.

• Establish baselines for OS images, container base images, cloud account/project settings, network rules, and security tools.
• Reference the baseline source: IaC repo, image pipeline definition, or controlled standard configurations.
• Define how baselines are updated (e.g., via pull request + approval).

Output: Baseline list with owners, storage locations, and change method.

4) Standardize the change control workflow

Write the workflow in “if/then” operator language, not narrative. Include:

• Change intake: ticketing system or PR as the system of record.
• Classification: standard vs normal vs emergency changes (define criteria).
• Risk review triggers: changes touching IAM, network exposure, logging, encryption, secrets, production data stores, or authentication.
• Testing expectations: what must be tested and where.
• Approval requirements: required approvers by change class.
• Implementation controls: pipeline gates, peer review, protected branches, change windows if you use them.
• Backout/rollback: documented rollback steps or proven revert mechanism (e.g., IaC rollback).
• Post-change validation: smoke tests, monitoring checks, security checks.
• Documentation updates: baseline/version updates, runbooks, architecture diagrams when materially affected.

Output: A one-page flow plus a detailed procedure section that maps to your tools.

5) Build drift detection and periodic review into operations

Your CM Plan must cover “keeping configurations correct,” not only “changing them.”

• Define how you detect drift (IaC plan diffs, configuration scanners, cloud policy monitoring, endpoint management reports).
• Define response steps: triage, ticket creation, remediation, exception handling.
• Define periodic review: who reviews which baselines and how you record attestation.

Output: Drift procedure + review cadence and evidence expectations (no need to claim specific frequencies if you can’t support them).

6) Address third party-managed configuration explicitly

Common audit failure: “our third party manages it” with no control story.

• List third party-managed components and what configuration authority they have.
• Require change records from the third party (tickets, release notes, change advisories) or define how you log their changes.
• Define access controls for third party admins and how you review activity.

Output: Third party configuration appendix and contract/control mapping notes.

7) Operationalize: train, publish, and run it

• Publish the CM Plan in a controlled repository.
• Train relevant teams (engineering, SRE, security, service desk) on “what changed for them.”
• Run a short internal test: pick recent changes and verify the plan’s evidence exists end-to-end.

Output: Training records or acknowledgments; internal readiness review notes.

Required evidence and artifacts to retain

Auditors typically want proof across governance, execution, and outcomes. Keep:

• Approved CM Plan with version history and approval record. ¹
• RACI matrix and role assignments.
• Configuration baselines (links to repos, image build definitions, baseline documents).
• Change records: tickets/PRs, approvals, risk review notes, test evidence, implementation timestamps.
• Emergency change records: justification, retrospective approval, lessons learned.
• Drift/monitoring outputs: alerts, findings, remediation tickets, exception documentation.
• Periodic review attestations: sign-offs, meeting notes, or recorded approvals.
• Third party change evidence: shared ticket exports, release communications, access logs (as contractually available).

Practical tip: if your evidence is split across tools, create an “evidence map” table that tells an auditor exactly where each artifact lives and who can export it.

Common exam/audit questions and hangups

Expect these lines of inquiry:

• “Show me your CM Plan and where it’s approved.” ¹
• “How do you know what the baseline is for production today?”
• “Walk me through a recent high-risk change from request to validation.”
• “How do you handle emergency changes, and what stops them from becoming the normal path?”
• “How do you detect unauthorized changes in cloud configuration?”
• “Which configurations are controlled by third parties, and how do you govern those changes?”

Hangups that slow audits:

• Plan describes a CAB, but approvers don’t match reality.
• No clear system-of-record (tickets vs PRs vs chat approvals).
• Baselines exist, but nobody can show the “current approved baseline” vs “current running state.”

Frequent implementation mistakes and how to avoid them

1. Writing a plan that isn’t tool-mapped
   Fix: add a table: “Process step → Tool → Evidence produced → Owner.”

2. Treating IaC as “auto-compliant”
   Fix: define PR review rules, protected branches, and how you prevent out-of-band console changes.

3. Emergency changes with no after-action control
   Fix: require post-implementation review and baseline reconciliation as a standard step.

4. Ignoring SaaS and managed services configuration
   Fix: include SaaS admin settings, logging configurations, and identity integrations as configuration items.

5. Third party admin access without configuration accountability
   Fix: include third party change notification and logging expectations in the CM Plan and supporting agreements.

Enforcement context and risk implications

No public enforcement cases were provided in the supplied sources, so you should treat audit risk as the primary external pressure. Practically, weak configuration management drives repeat findings because auditors can’t confirm that security settings remain stable between assessments. The operational risk is straightforward: configuration drift and undocumented changes are common root causes for security control failures (logging disabled, access widened, encryption misconfigured) and availability incidents (unreviewed firewall or routing changes).

Practical 30/60/90-day execution plan

First 30 days (stabilize and document the real process)

• Name the CM Plan owner and approvers; publish a draft RACI.
• Inventory configuration item categories and identify the highest-risk ones (IAM, network exposure, logging, encryption, secrets).
• Document the “current state” workflow exactly as teams run it today.
• Choose the system of record for changes (ticket + PR linkage rules).

Days 31–60 (make it auditable)

• Finalize and approve the CM Plan with version control and access controls. ¹
• Define baselines and where they live; confirm each has an owner.
• Implement minimum gating: peer review, approval capture, and post-change validation evidence.
• Add emergency change procedure and require retrospective documentation.

Days 61–90 (prove operating effectiveness)

• Run a configuration drift exercise and document remediation workflow.
• Perform an internal “mini-audit”: sample recent changes and verify end-to-end evidence.
• Close gaps: missing approvals, inconsistent ticket/PR linkage, unmanaged third party changes.
• Build an evidence map for assessors.

Where Daydream fits naturally: if you’re coordinating multiple teams and tools, Daydream can act as the control narrative hub, linking CM Plan requirements to the actual evidence (tickets, PRs, cloud logs) so you can answer audit requests without rebuilding context each time.

Frequently Asked Questions

Do we need a separate Configuration Management Plan if we already have a change management policy?

Often yes. Your change policy can set enterprise rules, but CM-9 expects a system-specific plan that names roles and describes the actual configuration control processes for that system. ¹

What is the “system” for the CM Plan in a cloud environment?

Use your authorization or compliance boundary: the set of cloud accounts/projects, services, applications, and supporting components that share security responsibility and are assessed together.

Can pull requests be the official change record?

Yes if the PR captures approvals, testing evidence, and links to the business/security context (often via an associated ticket). Auditors mainly care that the workflow is controlled, repeatable, and produces retrievable evidence.

How do we handle console changes in cloud that bypass IaC?

Define them as exceptions with strict access controls, require a ticket, and require reconciliation back into IaC or baseline documentation. Then monitor for drift so bypasses surface quickly.

What should we do about third party-managed services where we can’t see underlying configuration?

Document the shared responsibility boundary, list what you can configure, and require third party change communications or reports where feasible. If you can’t obtain evidence, document compensating controls and acceptance rationale.

How detailed should the CM Plan procedures be?

Detailed enough that a new engineer can follow the process and generate the expected evidence without tribal knowledge. If details belong in runbooks, link them and make ownership and update rules explicit.

Footnotes

1. NIST Special Publication 800-53 Revision 5