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Elasticsearch with HTTPS disabled

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Metadata

Id: cloudformation-aws-elasticsearch-with-https-disabled

Provider: AWS

Platform: CloudFormation

Severity: Medium

Category: Networking and Firewall

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Description

Domain endpoints for Elasticsearch/OpenSearch must enforce HTTPS to protect data in transit and prevent interception or tampering of requests and responses.

For CloudFormation resources of type AWS::Elasticsearch::Domain and AWS::OpenSearchService::Domain, the DomainEndpointOptions.EnforceHTTPS property must be defined and set to true. Resources missing DomainEndpointOptions, missing EnforceHTTPS, or with EnforceHTTPS set to false will be flagged.

Secure configuration example:

MyDomain:
  Type: AWS::OpenSearchService::Domain
  Properties:
    DomainName: my-domain
    DomainEndpointOptions:
      EnforceHTTPS: true

Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: description
Resources:
  OpenSearchDomain:
    Type: AWS::OpenSearchService::Domain
    Properties:
      DomainName: my-opensearch-domain
      ElasticsearchVersion: "7.9"
      ElasticsearchClusterConfig:
        InstanceType: m5.large.search
        InstanceCount: 1
      AdvancedOptions:
        rest.action.multi.allow_explicit_index: "true"
      DomainEndpointOptions:
        EnforceHTTPS: true
        TLSSecurityPolicy: "Policy-Min-TLS-1-2-2019-07"

Non-Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Description: description
Resources:
  OpenSearchDomain:
    Type: AWS::OpenSearchService::Domain
    Properties:
      DomainName: my-opensearch-domain
      ElasticsearchVersion: "7.9"
      ElasticsearchClusterConfig:
        InstanceType: m5.large.search
        InstanceCount: 1
      AdvancedOptions:
        rest.action.multi.allow_explicit_index: "true"
      DomainEndpointOptions:
        EnforceHTTPS: false
        TLSSecurityPolicy: "Policy-Min-TLS-1-2-2019-07"

AWSTemplateFormatVersion: "2010-09-09"
Description: description
Resources:
  ElasticsearchDomain:
    Type: AWS::Elasticsearch::Domain
    Properties:
      DomainName: my-elasticsearch-domain
      ElasticsearchVersion: "7.9"
      ElasticsearchClusterConfig:
        InstanceType: m5.large.elasticsearch
        InstanceCount: 1
      EBSOptions:
        EBSEnabled: true
        VolumeType: gp2
        VolumeSize: 10
      AccessPolicies:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              AWS: "*"
            Action: es:*
            Resource: arn:aws:es:REGION:ACCOUNT_ID:domain/my-elasticsearch-domain/*
      DomainEndpointOptions:
        TLSSecurityPolicy: "Policy-Min-TLS-1-2-2019-07"

AWSTemplateFormatVersion: "2010-09-09"
Description: description
Resources:
  ElasticsearchDomain:
    Type: AWS::Elasticsearch::Domain
    Properties:
      DomainName: my-elasticsearch-domain
      ElasticsearchVersion: "7.9"
      ElasticsearchClusterConfig:
        InstanceType: m5.large.elasticsearch
        InstanceCount: 1
      EBSOptions:
        EBSEnabled: true
        VolumeType: gp2
        VolumeSize: 10
      AccessPolicies:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              AWS: "*"
            Action: es:*
            Resource: arn:aws:es:REGION:ACCOUNT_ID:domain/my-elasticsearch-domain/*