Rule: SNS Topics should be encrypted at rest

Rule Description:

Troubleshooting Steps:

2. 1.
   Verify Encryption Configuration: Check the encryption settings of the SNS topics to ensure that they are properly configured to enable encryption at rest.
4. 2.
   Check Access Policies: Ensure that the necessary access policies are in place to restrict access to the SNS topics and prevent unauthorized users from accessing sensitive data.
6. 3.
   Review AWS Key Management Service (KMS): Check the KMS configuration to ensure that the appropriate encryption keys are being utilized for encrypting the SNS topics.
8. 4.
   Encryption Key Permissions: Ensure that the encryption keys used for SNS topic encryption have the necessary permissions to access and decrypt the data.
10. 5.
    Test Notifications: Test the SNS topic to verify that notifications are still functioning correctly after enabling encryption at rest.

Code Examples:

2. 1.
   AWS CLI Command to Enable Encryption for an SNS Topic:

aws sns set-topic-attributes \
   --topic-arn <topic-arn> \
   --attribute-name KmsMasterKeyId \
   --attribute-value <kms-key-id>

<topic-arn>

<kms-key-id>

2. 1.
   AWS CloudFormation Template to Create an Encrypted SNS Topic:

Resources:
  MySNSTopic:
    Type: AWS::SNS::Topic
    Properties:
      DisplayName: My Encrypted SNS Topic
      Subscription:
      - Protocol: email
        Endpoint: example@example.com
      KmsMasterKeyId: <kms-key-id>

<kms-key-id>

Remediation Steps:

2. 1.
   Identify the SNS Topics: Identify the SNS topics that need to be encrypted at rest according to the NIST 800-53 Revision 5 policy.
4. 2.
   Enable Encryption: Use the AWS Management Console, AWS CLI, or AWS CloudFormation to enable encryption for each identified SNS topic.

   • If using AWS Management Console:

     • Open the Amazon SNS console.
     • Select the desired SNS topic.
     • Go to the "Encryption" section.
     • Enable encryption and select the appropriate KMS key.
     • Save the changes.
   • If using AWS CLI:

     • Run the

       aws sns set-topic-attributes

       command provided earlier, replacing

       <topic-arn>

       and

       <kms-key-id>

       with the correct ARNs.
   • If using AWS CloudFormation:

     • Create or modify the CloudFormation template as shown in the provided example.
6. 3.
   Verify Encryption: Validate that the encryption is enabled for each SNS topic.

   • If using AWS Management Console:

     • Open the Amazon SNS console.
     • Select the SNS topic.
     • Verify that encryption is enabled.
   • If using AWS CLI:

     • Run the

       aws sns get-topic-attributes

       command with the appropriate topic ARN.
     • Check the response to ensure that encryption is indicated as enabled.
8. 4.
   Test Notifications: After enabling encryption at rest, test the SNS topic to ensure that notifications are still functioning as expected. This will help verify that the encryption implementation did not impact the basic functionality.