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How to Find AWS KMS Keys Without Rotation Enabled

Cryptographic best practices discourage extensive reuse of encryption keys. Consequently, AWS KMS keys should be rotated to prevent usage of compromised keys.

info

This security check is part of the CIS Amazon Web Services Benchmarks and is rated severity medium.

Prerequisites​

This guide assumes that you have already installed and configured Fix Inventory to collect your AWS resources.

Directions​

  1. Execute the following search command in Fix Inventory Shell:

    > search is(aws_kms_key) and kms_key_manager==CUSTOMER and access_key_status=Enabled and kms_key_rotation_enabled=false
    ​kind=aws_kms_key, ..., region=fixinventory-poweruser
    ​kind=aws_kms_key, ..., account=poweruser-team

  2. Pipe the search command into the dump command:

    > search is(aws_kms_key) and kms_key_manager==CUSTOMER and access_key_status=Enabled and kms_key_rotation_enabled=false | dump
    ​reported:
    ​  id: /aws/kms/123
    ​  name: some-name
    ​  ctime: '2022-12-05T22:53:14Z'
    ​  kind: aws_kms_key
    ​  age: 2mo28d

    The command output will list the details of all non-compliant aws_kms_key resources.

Remediation​

  • For each AWS KMS key, ensure that the Rotate this key every year setting is enabled.
note

Please refer to the AWS KMS documentation for details.

Further Reading​