Metadata

Id: 24e16922-4330-4e9d-be8a-caa90299466a

Cloud Provider: aws

Framework: Terraform

Severity: High

Category: Encryption

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• Provider Reference

Description

This check ensures that AWS Elasticsearch domains have encryption at rest enabled, which protects sensitive data stored in Elasticsearch indices from unauthorized access if the underlying physical storage is compromised. Without encryption at rest, data stored in Elasticsearch is vulnerable to exposure if someone gains access to the underlying storage media, potentially leading to data breaches and compliance violations.

To properly secure Elasticsearch, you must explicitly configure the encrypt_at_rest block with enabled set to true:

resource "aws_elasticsearch_domain" "example" {
  domain_name           = "example"
  elasticsearch_version = "1.5"

  encrypt_at_rest {
      enabled = true
  }
}

Insecure configurations either omit the encrypt_at_rest block entirely or explicitly set enabled to false.

Compliant Code Examples

resource "aws_elasticsearch_domain" "negative1" {
  domain_name           = "example"
  elasticsearch_version = "1.5"

  encrypt_at_rest {
      enabled = true
  }
}

Non-Compliant Code Examples

resource "aws_elasticsearch_domain" "positive1" {
  domain_name           = "example"
  elasticsearch_version = "1.5"
}

resource "aws_elasticsearch_domain" "positive2" {
  domain_name           = "example"
  elasticsearch_version = "1.5"

  encrypt_at_rest {
      enabled = false
  }
}