The different cloud service models have varying levels of responsibilities for functions and operations depending...

With Infrastructure as a Service (IaaS), the cloud customer is responsible for deploying and maintaining its own systems and virtual machines. Therefore, the customer is solely responsible for patching and any other security updates it finds necessary. With Software as a Service (SaaS), Platform as a Service (PaaS), and Desktop as a Service (DaaS), the cloud provider maintains the infrastructure components and is responsible for maintaining and patching them.