CMMC vs ISO 27017
CMMC
DoD certification verifying DIB cybersecurity for FCI and CUI
ISO 27017
International standard for cloud-specific information security controls
Quick Verdict
CMMC mandates verified cybersecurity for DoD contractors protecting FCI/CUI via tiered assessments, while ISO 27017 provides voluntary cloud-specific controls guidance within ISO 27001 ISMS. Organizations adopt CMMC for contract eligibility; ISO 27017 for global cloud assurance.
CMMC
Cybersecurity Maturity Model Certification 2.0
Key Features
- Three-tiered certification: Level 1 FCI, Level 2 CUI, Level 3 APTs
- Third-party C3PAO assessments verifying Level 2 NIST compliance
- DIBCAC-exclusive government assessments for Level 3 enhancements
- Strict 180-day POA&M closure requirements preventing delays
- Mandatory subcontractor flow-down via DFARS contract clauses
ISO 27017
ISO/IEC 27017:2015 Code of practice for cloud security controls
Key Features
- Clarifies shared responsibilities between CSPs and CSCs
- Adds 7 cloud-specific CLD controls for multi-tenancy
- Provides guidance on 37 ISO 27002 controls for cloud
- Addresses virtual machine hardening and segregation
- Integrates seamlessly with ISO 27001 ISMS audits
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
CMMC Details
What It Is
Cybersecurity Maturity Model Certification (CMMC) 2.0 is a U.S. Department of Defense (DoD) certification program ensuring cybersecurity protections in the Defense Industrial Base (DIB) for Federal Contract Information (FCI) and Controlled Unclassified Information (CUI). It employs a tiered, cumulative model with three levels, mapping to FAR 52.204-21, NIST SP 800-171 Rev 2 (110 controls), and NIST SP 800-172 (24 enhancements) via verified assessments.
Key Components
- 14 domains like Access Control, Incident Response, Risk Assessment
- Level 1: 17 basic practices; Level 2: 110 NIST controls; Level 3: +24 APT defenses
- Assessments: self (Level 1/2), C3PAO (Level 2), DIBCAC (Level 3)
- SSP, limited POA&Ms (180 days), SPRS/eMASS reporting
Why Organizations Use It
- Mandatory for DoD contracts; ineligibility without certification
- Reduces supply chain risks, breach costs, enhances resilience
- Procurement advantage, primes prefer certified subs
- Builds trust, aligns with NIST for broader maturity
Implementation Overview
- Phased: scoping/gaps, remediation, assessment, sustainment
- Targets DIB primes/subcontractors; enclave scoping for efficiency
- Triennial certifications, annual affirmations; budgets $100K+ for SMEs
ISO 27017 Details
What It Is
ISO/IEC 27017:2015 is a code of practice extending ISO/IEC 27002 with cloud-specific guidance. It provides implementation advice for information security controls in cloud services across IaaS, PaaS, and SaaS models. Its risk-based approach adapts generic controls to cloud risks like multi-tenancy and shared responsibilities.
Key Components
- Guidance on 37 ISO 27002 controls plus 7 additional cloud-specific CLD controls.
- Covers domains like access control, operations security, and supplier relationships.
- Built on ISO 27001 ISMS; not standalone certification.
- Dual perspectives for CSPs and CSCs.
Why Organizations Use It
- Addresses cloud gaps in baseline standards.
- Enhances regulatory alignment (e.g., GDPR) and procurement trust.
- Reduces risks from misconfigurations and unclear roles.
- Provides competitive edge via auditable cloud security posture.
Implementation Overview
- Integrate into existing ISO 27001 ISMS via risk assessment and SoA updates.
- Key activities: map controls, configure cloud environments, document responsibilities.
- Suits CSPs, CSCs of all sizes; global applicability.
- Audited as part of ISO 27001 certification (joint audits 9-12 months).
Key Differences
| Aspect | CMMC | ISO 27017 |
|---|---|---|
| Scope | DoD FCI/CUI protection, 3 levels, 171 practices | Cloud-specific security controls, 7 CLD + 37 guidance |
| Industry | Defense Industrial Base contractors, US-focused | Cloud providers/customers, global applicability |
| Nature | Mandatory DoD certification program | Voluntary ISO code of practice |
| Testing | Self/C3PAO/DIBCAC assessments every 3 years | Integrated into ISO 27001 audits |
| Penalties | Contract ineligibility, debarment | No legal penalties, certification loss |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about CMMC and ISO 27017
CMMC FAQ
ISO 27017 FAQ
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