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Elasticsearch domain endpoint is using outdated TLS policy.

Default Severity: high

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You should not use outdated/insecure TLS versions for encryption.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Outdated SSL policies increase exposure to known vulnerabilities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"
   }
 }