FedRAMP High is the strictest cloud security standard for U.S. government data. Meeting it with AWS S3 means every access path must be controlled, monitored, and auditable. Read-only roles become critical—the only way to ensure that sensitive data is never modified or deleted while still allowing approved visibility.
In AWS, an S3 read-only role under the FedRAMP High baseline is defined through IAM policies. These policies must explicitly allow only s3:GetObject, s3:ListBucket, and other retrieval actions, while denying any write, delete, or permission changes. The role must be scoped to specific buckets and prefixes to prevent data leakage, and access should be paired with strict session duration and logging.
Key steps to configure:
- Create a dedicated IAM role for read-only operations tied to your FedRAMP boundary.
- Attach a custom policy permitting list and get actions, explicitly denying all modification calls.
- Enforce encryption in transit and at rest to meet FedRAMP High data handling rules.
- Enable CloudTrail and S3 server access logging so every read action is tracked.
- Use AWS Config to continuously scan for policy drift or unexpected grants.
Compliance under FedRAMP High is not just policy—it’s proof of control. Auditors will want evidence that no user or process can elevate beyond read-only rights. Automating checks for IAM misconfigurations will reduce risk and speed certification.
If you need to deploy AWS S3 roles with FedRAMP High baseline compliance—and see read-only access enforced in minutes—check out hoop.dev and watch it run live.