IaaS platforms outsource the hardware and network backbone of your applications. That power comes with dependencies—cloud providers, API services, and vendors you trust to keep uptime and security high. Each one can be a potential attack surface. A proper IaaS third-party risk assessment identifies, quantifies, and reduces those risks before code even ships.
Start with asset discovery. Map every third-party connection in your IaaS environment: compute instances, storage buckets, network gateways, and any external integrations. Document service providers and their security controls. Pay attention to contractual obligations; SLAs and compliance certifications differ between providers.
Next, evaluate their security posture. Verify encryption standards, access control policies, and patch management cycles. Check audit logs for anomalies. Review vendor breach histories—past incidents signal patterns of weaknesses. Use penetration testing aimed at dependencies, not just your own application.