CSA Cloud Controls Matrix for Cloud Audits
A practical guide to using the Cloud Security Alliance Cloud Controls Matrix for auditing cloud environments, including control domains and assessment procedures.
The Cloud Security Alliance (CSA) Cloud Controls Matrix (CCM) is a cybersecurity control framework specifically designed for cloud computing environments. For CISA professionals auditing cloud services or organizations migrating to the cloud, the CCM provides a structured approach to evaluating cloud security controls and assessing cloud service provider risk.
What Is the Cloud Controls Matrix?
The CCM is a framework of cloud-specific security controls mapped to leading standards, regulations, and control frameworks. It provides a comprehensive set of security principles that guide cloud vendors and assist cloud customers in assessing the overall security risk of a cloud provider. The matrix is organized into control domains with specific control specifications.
CCM Control Domains
Audit and Assurance (A&A)
Controls related to audit planning, independent assessments, risk-based planning, and information system regulatory mapping. Auditors should verify that cloud providers undergo regular independent assessments and make audit results available to customers.
Application and Interface Security (AIS)
Controls covering application security, secure application design, application vulnerability remediation, and API security. Evaluate whether the provider implements secure software development practices and maintains application-level security controls.
Business Continuity Management and Operational Resilience (BCR)
Controls for business continuity planning, testing, power and telecommunications resilience, and environmental controls. Assess whether the provider's continuity capabilities meet your organization's recovery requirements.
Change Control and Configuration Management (CCC)
Controls governing change management processes, including unauthorized change detection, baseline configuration, and change restoration. Review how changes are controlled within the cloud environment and whether customers are notified of changes that affect their services.
Cryptography, Encryption, and Key Management (CEK)
Controls for encryption, key management, and cryptographic material protection. Evaluate the provider's encryption capabilities for data at rest, in transit, and in use. Assess key management practices, including whether customers can manage their own encryption keys.
Datacenter Security (DCS)
Controls for physical and environmental security of data center facilities. While cloud customers have limited visibility into physical controls, auditors should review SOC 2 reports and other attestations for assurance over these controls.
Data Security and Privacy Lifecycle Management (DSP)
Controls covering data classification, inventory, handling, storage, retention, and deletion. Verify that data lifecycle management practices align with contractual obligations and regulatory requirements.
Governance, Risk, and Compliance (GRC)
Controls for governance program, risk management framework, and organizational policy. Assess the provider's governance structure and risk management practices for maturity and comprehensiveness.
Human Resources (HRS)
Controls for background screening, employment agreements, training, and personnel termination. Review the provider's human resources security practices through available attestation reports.
Identity and Access Management (IAM)
Controls for identity provisioning, authentication, access management, and privileged access. Evaluate the IAM capabilities offered to customers and the provider's own administrative access controls.
Infrastructure and Virtualization Security (IVS)
Controls specific to cloud infrastructure, including network security, hypervisor hardening, and virtual machine security. Assess how the provider secures the underlying infrastructure and maintains isolation between tenants.
Interoperability and Portability (IPY)
Controls addressing data portability, policy compatibility, and interoperability standards. Evaluate exit strategies and data migration capabilities to avoid vendor lock-in.
Using CCM in Cloud Audits
- Pre-Engagement Assessment: Use the CCM as a due diligence checklist when evaluating potential cloud service providers
- Contract Review: Map contractual security requirements to CCM controls to identify gaps in provider commitments
- Ongoing Monitoring: Use the CCM to structure ongoing assessment of cloud service provider security posture
- Shared Responsibility Mapping: Identify which CCM controls are the provider's responsibility, which are the customer's, and which are shared
STAR Registry
The CSA Security, Trust, Assurance, and Risk (STAR) Registry is a publicly accessible registry that documents the security and privacy controls provided by cloud computing offerings. Providers can submit self-assessments (Level 1) or undergo third-party audits (Level 2) against the CCM. Auditors should check the STAR Registry as part of their cloud provider assessment process.
Integration with Other Frameworks
The CCM includes mappings to ISO 27001, NIST 800-53, PCI DSS, AICPA TSC, and other frameworks. This cross-referencing enables auditors to leverage CCM assessments to satisfy multiple compliance requirements and provide comprehensive cloud security assurance.
As cloud adoption accelerates, the CCM becomes an increasingly important tool for CISA professionals. Mastering this framework positions IT auditors to provide valuable cloud-specific assurance and advisory services.