Description:

This policy ensures that only admin IAM roles have access to encryption keys for backup media. This is important to protect the confidentiality of the encryption keys.

Rationale:

Encryption keys are a critical part of the backup process. If encryption keys are not protected, they could be accessed by unauthorized individuals. This could lead to unauthorized decryption of backup media, which could result in data breaches.

Impact:

The impact of not restricting access to encryption keys could be significant. If encryption keys are not protected, they could be accessed by unauthorized individuals. This could lead to unauthorized decryption of backup media, which could result in data breaches. For example, the organization could lose customers, suffer financial losses, or be subject to regulatory fines.

Default Value:

AWS recommends that organizations restrict access to encryption keys to only admin IAM roles. This can be done by using IAM permissions to control who can access the encryption keys.

Pre-requisites:

To implement this policy, you will need to have access to the IAM console or the AWS CLI. You will also need to have the appropriate permissions to create and manage IAM roles.

Remediation Steps:

The following steps can be used to remediate this policy:

  1. Identify the IAM roles that have access to the encryption keys.
  2. Remove access to the encryption keys from all IAM roles except for admin roles.
  3. Document the changes to the IAM permissions.

Test Plan:

The following steps can be used to test the remediation steps:

  1. Verify that the IAM roles that have access to the encryption keys have been updated.
  2. Verify that the encryption keys are no longer accessible to non-admin IAM roles.

Implementation Plan:

The following steps can be used to implement the policy:

  1. Identify the IAM roles that have access to the encryption keys.
  2. Remove access to the encryption keys from all IAM roles except for admin roles.
  3. Document the changes to the IAM permissions.

AWS CLI Process:

The following command can be used to remove access to an encryption key from an IAM role using the AWS CLI:

aws kms revoke-access-key --key-id my-key-id --user-arn arn:aws:iam::123456789012:user/my-user

Using AWS GUI:

The following steps can be used to remove access to an encryption key from an IAM role using the AWS Management Console:

  1. Go to the AWS Management Console.
  2. Click on the "KMS" service.
  3. Click on the "Keys" tab.
  4. Select the key that you want to revoke access to.
  5. Click on the "Permissions" tab.
  6. Click on the "Remove" button next to the IAM role that you want to revoke access to.

Backout Plan:

The following steps can be used to revoke the changes made to implement this policy:

  1. Re-grant access to the encryption keys to the IAM roles that were originally granted access.

Note:

  • This policy is not intended to replace the need for a comprehensive disaster recovery plan.
  • This policy is specific to AWS resources. Other resources, such as on-premises servers, may require different access control procedures.

Reference:

  • AWS KMS documentation: https://docs.aws.amazon.com/kms/latest/developerguide/
  • AWS IAM documentation: https://docs.aws.amazon.com/IAM/latest/UserGuide/

Section 2:

  • Tags: backup, encryption, security, access control
  • Keywords: AWS, KMS, IAM, CLI, GUI