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# AWS MSK cluster encryption in transit is not enabled misconfiguration detected in code

## Rule Details

|                        |                                           |
| ---------------------- | ----------------------------------------- |
| Cortex AppSec Rule ID  | APPSEC\_AWS\_81                           |
| Category - Subcategory | Storage - Encryption                      |
| Provider               | AWS                                       |
| Severity               | MEDIUM                                    |
| Framework              | CloudFormation, Terraform, Terraform Plan |
| Mapped CSPM/KSPM Rule  | 18d55f5a-c4de-4fc1-9346-c95b523f58d0      |

## Impact

This rule identifies AWS Managed Streaming for Apache Kafka clusters having in-transit encryption in a disabled state.

In-transit encryption secures data while it's being transferred between brokers. Without it, there's a risk of data interception during transit.

It is recommended to enable in-transit encryption among brokers within the cluster. This ensures that all data exchanged within the cluster is encrypted, effectively protecting it from potential eavesdropping and unauthorized access.

## How to Fix

To fix this issue, ensure that the `EncryptionInfo` property in the `AWS::MSK::Cluster` resource includes `EncryptionInTransit` settings with `ClientBroker` set to `TLS` and `InCluster` set to `true`.

## Example: \[source,go]

## Resources: MyMSKCluster: Type: AWS::MSK::Cluster Properties: ClusterName: example-cluster KafkaVersion: 2.8.0 NumberOfBrokerNodes: 3 BrokerNodeGroupInfo: ... EncryptionInfo: EncryptionAtRest: DataVolumeKMSKeyId: arn:aws:kms:us-west-2:123456789012:key/example-key-arn EncryptionInTransit: ClientBroker: TLS InCluster: true ...


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