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The minimum TLS version for Storage Accounts should be TLS1_2

Default Severity: critical

Explanation

Azure Storage currently supports three versions of the TLS protocol: 1.0, 1.1, and 1.2.

Azure Storage uses TLS 1.2 on public HTTPS endpoints, but TLS 1.0 and TLS 1.1 are still supported for backward compatibility.

This check will warn if the minimum TLS is not set to TLS1_2.

Possible Impact

The TLS version being outdated and has known vulnerabilities

Suggested Resolution

Use a more recent TLS/SSL policy for the load balancer

Insecure Example

The following example will fail the azure-storage-use-secure-tls-policy check. 

 resource "azurerm_storage_account" "bad_example" {
   name                     = "storageaccountname"
   resource_group_name      = azurerm_resource_group.example.name
   location                 = azurerm_resource_group.example.location
 }

Secure Example

The following example will pass the azure-storage-use-secure-tls-policy check. 

 resource "azurerm_storage_account" "good_example" {
   name                     = "storageaccountname"
   resource_group_name      = azurerm_resource_group.example.name
   location                 = azurerm_resource_group.example.location
   min_tls_version          = "TLS1_2"
 }