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Neptune cluster storage is encrypted at rest

neptune_cluster_storage_encrypted
Service: neptuneSeverity: high
OfficialBuilt-inVerified
Categories:encryption
Resource Type:Other

Neptune DB cluster is evaluated for encryption at rest. Indicating the cluster's underlying storage is not encrypted.

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Risk

Unencrypted Neptune storage reduces confidentiality of stored data and metadata and increases attack surface.

Possible impacts:

  • Unauthorized access or data exfiltration from underlying volumes or snapshots
  • Greater blast radius from leaked or shared snapshots

Run this check with Prowler

Run in Prowler Cloud
Run
prowler aws --checks neptune_cluster_storage_encrypted

Recommendation

Provision all new Neptune DB clusters with encryption at rest and prefer Customer-Managed Keys (CMK) for key ownership and auditability.

Enforce least privilege on KMS keys, implement key lifecycle practices (rotation, revocation) and ensure backups/snapshots remain encrypted to prevent exposure.

Remediation

Terraform

resource "aws_neptune_cluster" "example_resource" {
  cluster_identifier = "<cluster-id>"
  storage_encrypted  = true  # Enable encryption at rest for data protection
}

NativeIaC

Resources:
  EncryptedNeptuneCluster:
    Type: AWS::Neptune::DBCluster
    Properties:
      DBClusterIdentifier: !Sub ${DBClusterIdentifier}
      StorageEncrypted: true  # Enable encryption at rest for data protection

Check Code

from prowler.lib.check.models import Check, Check_Report_AWS
from prowler.providers.aws.services.neptune.neptune_client import neptune_client


class neptune_cluster_storage_encrypted(Check):
    def execute(self):
        findings = []
        for cluster in neptune_client.clusters.values():
            report = Check_Report_AWS(metadata=self.metadata(), resource=cluster)
            report.resource_id = cluster.name
            report.status = "FAIL"
            report.status_extended = (
                f"Neptune Cluster {cluster.name} is not encrypted at rest."
            )
            if cluster.encrypted:
                report.status = "PASS"
                report.status_extended = (
                    f"Neptune Cluster {cluster.name} is encrypted at rest."
                )

            findings.append(report)

        return findings

References