Rule: KMS CMK Rotation should be enabled
This rule ensures that KMS CMK Rotation is enabled as part of System and Communications Protection (SC) benchmarks.
| Rule | KMS CMK rotation should be enabled |
| Framework | FedRAMP Low Revision 4 |
| Severity | ✔ Critical |
Rule Description
KMS CMK (Key Management Service Customer Master Key) rotation should be enabled for FedRAMP (Federal Risk and Authorization Management Program) Low Revision 4. This rule ensures that the CMKs used for encryption within the AWS Key Management Service are regularly rotated to enhance security and comply with the FedRAMP Low security level requirements.
Enabling CMK rotation ensures that cryptographic keys used for encryption are periodically updated, reducing the risk of unauthorized access or compromise of sensitive data. This measure is essential for maintaining a robust and secure cloud environment.
Troubleshooting Steps
If you encounter any issues while enabling KMS CMK rotation for FedRAMP Low Revision 4, you can follow these troubleshooting steps:
- 1.
Verify IAM Permissions: Ensure that the IAM (Identity and Access Management) user or role used to configure CMK rotation has appropriate permissions to manage KMS resources. Check for any policy conflicts or missing permissions that may hinder CMK rotation.
- 2.
AWS CLI Version: Verify that you have the latest version of the AWS CLI (Command Line Interface) installed. Outdated versions may cause compatibility issues with certain KMS features, including CMK rotation.
- 3.
Enable AWS Key Management Service: Ensure that the AWS Key Management Service is enabled in your AWS account. If it is not enabled, you won't be able to perform CMK rotation. You can enable KMS by following the guidelines provided by AWS or by contacting AWS Support for assistance.
- 4.
Review Key Policy: Check the key policy associated with the CMK in question. In order to enable CMK rotation, the key policy must include the necessary permissions to perform rotation actions. Review the AWS documentation for the correct key policy statements required for CMK rotation.
- 5.
Check Key Usage: Confirm that the CMK is actively used for encryption purposes. If the CMK is not actively used, rotation may not be required. Consider retiring or disabling unused keys to avoid unnecessary overhead.
- 6.
Logging and Monitoring: Enable KMS key usage logging and monitoring to have a comprehensive record of key rotation events. This will help in troubleshooting any future issues and maintaining compliance.
Necessary Codes
There are no specific codes provided for enabling KMS CMK rotation for FedRAMP Low Revision 4. However, you may need to use AWS CLI commands to perform various actions related to troubleshooting and verification. Below are some commonly used CLI commands for KMS:
- 1.
aws kms enable-key-rotation --key-id <key-id>: Use this command to enable CMK rotation for a specific CMK identified by its key ID.
- 2.
aws kms get-key-rotation-status --key-id <key-id>: Use this command to check the rotation status of a specific CMK identified by its key ID.
Note: Replace <key-id> with the actual ID of the CMK you want to enable rotation for.
Step-by-Step Guide for Remediation
To enable KMS CMK rotation for FedRAMP Low Revision 4, follow these step-by-step instructions:
- 1.
Access AWS Management Console: Login to the AWS Management Console using your credentials.
- 2.
Navigate to Key Management Service: Search for "Key Management Service" in the AWS Management Console search bar and click on the appropriate result to open the KMS service page.
- 3.
Select the CMK: From the list of available CMKs, locate the desired CMK to enable rotation for and click on its key ID to access the key details page.
- 4.
Enable Rotation: On the CMK details page, navigate to the "Key Rotation" section and click on the "Enable Key Rotation" button. This action will enable CMK rotation for the selected CMK.
- 5.
Confirm Rotation Status: After enabling rotation, you can confirm the rotation status by either reviewing the console message or by using the AWS CLI command mentioned earlier.
- 6.
Review Key Policy: Double-check the key policy associated with the CMK to ensure it includes necessary permissions for CMK rotation.
- 7.
Monitor and Test: Monitor the rotation events for the CMK through KMS key usage logs and occasionally test the rotation process to ensure it functions as intended.
Note: It is recommended to consult AWS documentation and adhere to FedRAMP guidelines for complete implementation details and any additional steps required to comply with the FedRAMP Low Revision 4.