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Elasticache Replication Group uses unencrypted traffic.

Default Severity: high

Explanation

Traffic flowing between Elasticache replication nodes should be encrypted to ensure sensitive data is kept private.

Possible Impact

In transit data in the Replication Group could be read if intercepted

Suggested Resolution

Enable in transit encryption for replication group

Insecure Example

The following example will fail the aws-elasticache-enable-in-transit-encryption check. 

 resource "aws_elasticache_replication_group" "bad_example" {
         replication_group_id = "foo"
         replication_group_description = "my foo cluster"
         transit_encryption_enabled = false
 }

Secure Example

The following example will pass the aws-elasticache-enable-in-transit-encryption check. 

 resource "aws_elasticache_replication_group" "good_example" {
         replication_group_id = "foo"
         replication_group_description = "my foo cluster"
         transit_encryption_enabled = true
 }