ISO 27017 compliance checklist: cloud controls and audit evidence

Rows of cloud infrastructure servers Photo: Unsplash

An ISO 27017 compliance checklist should do more than confirm that policies exist. It should connect every cloud control to a service, responsible party, operating workflow, and dated evidence record.

This guide covers:

Scoping cloud assets and provider/customer roles
Building a shared responsibility matrix
Checking baselines, logging, privileges, virtualization, and agreements
Packaging evidence for internal and external assessment

Related guides:

Working through the cloud checklist

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Key takeaways

Begin with services, data, and roles. An unscoped checklist produces controls that cannot be tested.
Use a responsibility matrix as operational documentation. Include owners, evidence, dependencies, and escalation—not only “provider” or “customer.”
Test cloud configuration continuously where practical. Approved baselines lose value when drift is invisible.
Reconcile contracts with technical reality. Logging, deletion, incident, and access commitments should match the service.
Sample evidence before the audit. A control is not ready if records cannot be retrieved or do not cover the audit period.

1. Scope cloud services and roles

Create an inventory of in-scope SaaS, PaaS, IaaS, identity, source control, observability, backup, support, and security services. For each entry record:

Business and technical owner
Provider, customer, and subprocessor relationships
Data classification, residency, and retention
Production and non-production environments
Authentication and privileged access method
Logging, backup, and incident dependencies
Contract, security terms, and renewal date

A SaaS company is commonly a provider to customers and a customer of its infrastructure vendors. Model both layers. Confirm the inventory with engineering, security, privacy, procurement, and product owners at least annually and after material architecture changes.

Scoping decision	Include when	Evidence
Service	It stores, processes, transmits, secures, or monitors in-scope data	Approved inventory record
Region	Workloads or backups may operate there	Architecture and provider configuration
Team	It administers or supports the service	Role and access records
Supplier	It affects a control outcome	Contract and supplier review

2. Build the responsibility matrix

For each applicable control, identify the performing party, accountable owner, evidence source, frequency, and failure path.

Provider and customer duties are documented.
Responsibilities match architecture and service terms.
Dependencies between provider and customer tasks are visible.
Security incidents have notification and escalation owners.
Changes to the service trigger matrix review.
Exceptions have approval, compensating controls, and expiry.

Test ambiguous statements. “Logging is shared,” for example, should become: the provider generates platform audit events and retains them for an agreed period; the customer enables tenant events, routes alerts, and reviews them weekly; security owns escalation.

3. Implement cloud controls

Cloud asset inventory and acceptable use

Cloud services and information assets have owners.
Provisioning requires an approved intake and risk review.
Unsanctioned services are detected and addressed where feasible.
Offboarding covers data export, return, deletion, and access removal.

Typical evidence: inventory exports, intake tickets, risk assessments, and completed offboarding records.

Secure configuration baselines

Approved baselines exist for accounts, networks, compute, containers, storage, databases, and identities.
Infrastructure-as-code changes receive review.
Drift and public exposure generate actionable findings.
Exceptions are risk-assessed and time-bound.
Patch and vulnerability requirements reflect workload risk.

Typical evidence: baseline versions, repository approvals, scanner exports, drift alerts, and remediation tickets.

Logging and monitoring

Administrative, authentication, configuration, and security events are logged.
Log retention and access are defined.
Time synchronization is consistent.
High-risk events have alert owners and response targets.
Reviews or alert investigations leave dated records.
Customer-visible logs match contractual representations.

Administrative privileges

Named accounts and MFA are required.
Privileges follow least privilege and role separation.
Joiner, mover, and leaver events update access promptly.
Emergency access is controlled, logged, and reviewed.
Privileged access is reviewed on a defined cadence.

Virtualization and tenant separation

Tenant boundaries are documented in architecture.
Images, containers, and orchestration settings use hardened baselines.
Isolation controls receive security testing.
Virtual networks use approved segmentation patterns.
Host, hypervisor, and managed-service responsibilities are allocated.

Providers commonly cannot expose sensitive infrastructure details. In that case, select evidence that provides assurance without creating new risk: independent reports, testing summaries, control descriptions, and sampled walkthroughs.

Data return and deletion

Contracts define return and deletion conditions.
The workflow covers active systems, replicas, and backups.
Requests require authorization.
Completion produces traceable records.
The process is tested before relying on it.

4. Align customer agreements

Review master terms, data processing terms, security exhibits, support procedures, and product documentation against the matrix.

Security responsibilities are clear and accessible.
Available logging and security features are accurately described.
Incident notification commitments have an executable workflow.
Data location, backup, return, and deletion terms match architecture.
Subcontracted services are governed consistently.
Material service changes have communication rules.

Legal may own agreement language, but engineering and security should validate feasibility. Customer success commonly needs a playbook for security requests, offboarding, and incident coordination.

5. Test evidence and readiness

Build an evidence index mapping controls to systems of record. Then sample at least one complete workflow: an access review, configuration finding, incident drill, change approval, supplier review, and customer deletion request.

Ask:

Is the artifact within scope and audit period?
Does it identify an owner and date?
Does it show approval or review?
Can an assessor trace an exception to closure?
Does the artifact match the policy and contract?

Run an internal audit independent of the control operators where practical. Record nonconformities, root causes, actions, owners, due dates, and closure evidence. Management should review material cloud risks, audit results, incidents, metrics, and resource needs.

Checklist workflow and owners

Treat checklist completion as a control lifecycle. The coordinator opens each review with the expected population and acceptance criteria; the operator supplies records; the reviewer identifies exceptions; the owner remediates or accepts risk; and GRC verifies closure. Preserve all five stages. A checked box without the population reviewed, decision made, and follow-up completed may not demonstrate operating effectiveness.

Before handoff to an assessor, ask a person outside the workstream to retrieve a sample using only the evidence index. If they cannot determine which artifact is current, who approved it, or whether an exception closed, improve naming, metadata, and linkage. This simple “cold retrieval” test commonly exposes audit friction before it consumes interview time.

Workstream	Common owner	Supporting teams	Review cadence
Scope and inventory	Security/GRC	Engineering, procurement	Quarterly
Responsibility matrix	Security architect	Legal, product, operations	On material change
Baselines and virtualization	Cloud engineering	Security	Continuous/quarterly
Logging and privileges	Security operations	IT, engineering	Monthly/quarterly
Customer agreements	Legal	Security, customer success	On template change
Evidence and internal audit	GRC/internal audit	All owners	At least annually

Cadences should be risk-based. “Quarterly” is common, not universally required. Define triggers for high-risk changes so the program does not wait for a calendar review.

Run the checklist in SecureSlate

SecureSlate helps teams map ISO 27017 controls, assign provider and customer owners, automate recurring evidence requests, track remediation, and reuse approved evidence across audits and customer reviews.

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FAQ: ISO 27017 compliance

Is every checklist item mandatory?

Applicability depends on scope, role, risks, and adopted criteria. Document decisions and justified exclusions with your ISMS and certification body.

What evidence is strongest?

Evidence produced by normal operations—configuration exports, logs, approvals, tickets, reviews, and test results—is typically stronger than a policy alone.

How often should the responsibility matrix be reviewed?

At a defined cadence and when architecture, suppliers, features, or agreements materially change.

Can this checklist replace the standard?

No. Use the official standards, your risk assessment, contractual obligations, and qualified assessor guidance.

Disclaimer (legal note)

SecureSlate is not a law firm, and this article does not constitute or contain legal advice or create an attorney-client relationship. Consult qualified legal counsel and your certification body when determining obligations and audit criteria.