Kms unused customer keys remediation

Using Console

Using CLI

To remediate the misconfiguration of an unused customer master key in AWS using AWS CLI, you can follow these steps:

Open your AWS CLI and run the following command to list all the Customer Master Keys (CMKs) in your account:
```
aws kms list-keys
```
This command will return a list of all the CMKs in your account.
Identify the unused CMK that you want to remove and make sure that it is not being used by any resources or services in your account.
Run the following command to disable the CMK:
```
aws kms disable-key --key-id <key-id>
```
Replace <key-id> with the ID of the CMK that you want to disable.
After disabling the CMK, run the following command to schedule the deletion of the CMK:
```
aws kms schedule-key-deletion --key-id <key-id> --pending-window-in-days 7
```
Replace <key-id> with the ID of the CMK that you want to delete and --pending-window-in-days with the number of days (between 7 and 30) that you want to wait before the CMK is permanently deleted.
Verify that the CMK has been scheduled for deletion by running the following command:
```
aws kms list-scheduled-key-deletions
```
This command will return a list of all the CMKs that are scheduled for deletion.
Once the scheduled deletion time has passed, the CMK will be permanently deleted from your account.

Note: Before deleting any CMK, it is important to ensure that it is not being used by any resources or services in your account. Deleting a CMK that is being used can cause data loss or service disruption.

Using Python

To remediate the misconfiguration “Unused Customer Master Key Should Be Removed” in AWS using Python, you can follow the below steps:

Import the necessary AWS SDKs and modules in Python.
Use the AWS Key Management Service (KMS) API to list all the customer master keys (CMKs) in your AWS account.
For each CMK, check if it is in use by any AWS resource or service. If not, delete the CMK.
To delete a CMK, use the boto3 Python module to call the kms.delete_key() method and pass the CMK ID as a parameter.

Here is a sample Python code that can help you remediate the misconfiguration:

import boto3

# Create a KMS client
kms = boto3.client('kms')

# List all the customer master keys (CMKs)
response = kms.list_keys()

# For each CMK, check if it is in use by any AWS resource or service
for key in response['Keys']:
    key_id = key['KeyId']
    key_metadata = kms.describe_key(KeyId=key_id)

    if not key_metadata['KeyMetadata']['Enabled']:
        # If the CMK is disabled, delete it
        print(f"Deleting disabled CMK {key_id}...")
        kms.schedule_key_deletion(KeyId=key_id)
    elif not key_metadata['KeyMetadata']['KeyUsage']:
        # If the CMK is not in use, delete it
        print(f"Deleting unused CMK {key_id}...")
        kms.schedule_key_deletion(KeyId=key_id)
    else:
        print(f"Skipping CMK {key_id}: in use by {key_metadata['KeyMetadata']['KeyUsage']}")

print("CMK remediation completed.")

Note: Before running the code, make sure you have the necessary AWS credentials and permissions to access the KMS API. Also, make sure to test the code in a non-production environment before implementing it in a production environment.

AWS Introduction

AWS Pricing

AWS Threats

AWS Misconfigurations

Kms unused customer keys remediation

Triage and Remediation

Remediation