The minimum TLS version for Storage Accounts should be TLS1_2

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The TLS version being outdated and has known vulnerabilities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"
}

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