Elasticsearch domain endpoint is using outdated TLS policy.

Explanation

You should not use outdated/insecure TLS versions for encryption. You should be using TLS v1.2+.

Possible Impact

Outdated SSL policies increase exposure to known vulnerabilities

Suggested Resolution

Use the most modern TLS/SSL policies available

Insecure Example

The following example will fail the aws-elastic-search-use-secure-tls-policy check.

resource "aws_elasticsearch_domain" "bad_example" {
  domain_name = "domain-foo"

  domain_endpoint_options {
    enforce_https = true
    tls_security_policy = "Policy-Min-TLS-1-0-2019-07"
  }
}

Secure Example

The following example will pass the aws-elastic-search-use-secure-tls-policy check.

resource "aws_elasticsearch_domain" "good_example" {
  domain_name = "domain-foo"

  domain_endpoint_options {
    enforce_https = true
    tls_security_policy = "Policy-Min-TLS-1-2-2019-07"
  }
}

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