Rule: Ensure IAM policy should not grant full access to service
This rule ensures that IAM policies do not provide unrestricted access to services.
| Rule | Ensure IAM policy should not grant full access to service |
| Framework | FedRAMP Moderate Revision 4 |
| Severity | ✔ Critical |
IAM Policy: Full Access to Service
Description
This rule ensures that IAM policies do not grant full access to a specific service in compliance with regulations set by the Federal Risk and Authorization Management Program (FedRAMP) Moderate Revision 4. Granting full access to a service increases the risk of unauthorized actions and potential security breaches.
Troubleshooting Steps
If an IAM policy grants full access to a service, follow these troubleshooting steps to remediate the issue:
- 1.Identify the IAM policy that grants full access to the service.
- 2.Review the policy to understand its permissions and scope.
- 3.Verify if there is a legitimate need for granting full access to the service.
- 4.Determine if any specific permissions can be removed or restricted without impacting the intended functionality.
Necessary Codes
No specific code snippets are required for this rule.
Remediation Steps
To remediate the IAM policy and ensure it doesn't grant full access to the service, follow these steps:
- 1.Identify the IAM policy attached to the user, group, or role that grants full access to the service.
- 2.Access the AWS Management Console or use the AWS Command Line Interface (CLI) to modify the policy.
- 3.Edit the IAM policy using the appropriate tool and alter the permissions to provide the necessary access without granting full access.
- 4.Review and validate the changes to ensure they align with the security requirements and compliance mandates.
- 5.Test the modified policy to confirm that the desired functionality is maintained.
- 6.Communicate the changes with relevant stakeholders to ensure they are aware of the modifications made to the IAM policy.
Recommended CLI Command
If using the AWS CLI, the following command can be used to modify an IAM policy:
aws iam put-group-policy --group-name <group-name> --policy-name <policy-name> --policy-document file://policy.json
Replace
<group-name><policy-name>policy.jsonConclusion
By following the steps and recommendations provided above, you can ensure that IAM policies do not grant full access to a specific service, thus maintaining compliance with FedRAMP Moderate Revision 4 regulations. Regular monitoring and audits of IAM policies help maintain a secure and controlled environment.