The "overly permissive service access" compliance check is specifically designed to evaluate and ensure that cloud services are not granted more permissions than necessary, which could lead to potential security risks. Among the listed options, Amazon Web Services (AWS) is known for its extensive service offerings and the complexity of its Identity and Access Management (IAM) configurations. Prisma Cloud, a comprehensive cloud security platform by Palo Alto Networks, provides extensive support for AWS, including checks for overly permissive service access. This ensures that AWS environments adhere to the principle of least privilege, reducing the attack surface by limiting access to the minimum necessary to perform required tasks. Prisma Cloud's capabilities in AWS environments are detailed in various resources, including documentation and guides provided by Palo Alto Networks, which highlight its effectiveness in identifying and mitigating risks associated with excessive permissions in AWS services.

To create a custom policy within a cloud security platform like Prisma Cloud, security teams have the flexibility to either add a new policy from scratch or clone an existing one to serve as a foundation for customization. Adding a new policy allows for the creation of a completely tailored rule set based on specific security requirements. Cloning an existing policy, on the other hand, provides a quick start by using the structure of an already established policy, which can then be modified to fit particular needs. This approach is beneficial for maintaining consistency with existing policies while addressing unique security scenarios. Disabling an out-of-the-box policy (option C) or editing the query in an out-of-the-box policy (option D) are actions that might be taken to customize policy enforcement but do not equate to the creation of a new custom policy.