EFS Encryption has not been enabled

Explanation

If your organization is subject to corporate or regulatory policies that require encryption of data and metadata at rest, we recommend creating a file system that is encrypted at rest, and mounting your file system using encryption of data in transit.

Possible Impact

Data can be read from the EFS if compromised

Suggested Resolution

Enable encryption for EFS

Insecure Example

The following example will fail the AVD-AWS-0037 check.

---
Resources:
  BadExample:
    Type: AWS::EFS::FileSystem
    Properties:
      BackupPolicy:
        Status: ENABLED
      LifecyclePolicies:
        - TransitionToIA: AFTER_60_DAYS
      PerformanceMode: generalPurpose
      Encrypted: false
      ThroughputMode: bursting

Secure Example

The following example will pass the AVD-AWS-0037 check.

---
Resources:
  GoodExample:
    Type: AWS::EFS::FileSystem
    Properties:
      BackupPolicy:
        Status: ENABLED
      LifecyclePolicies:
        - TransitionToIA: AFTER_60_DAYS
      PerformanceMode: generalPurpose
      Encrypted: true
      ThroughputMode: bursting


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