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# Storage for critical data are not encrypted with Customer Managed Key misconfiguration detected in c

## Rule Details

|                        |                           |
| ---------------------- | ------------------------- |
| Cortex AppSec Rule ID  | APPSEC2\_AZURE\_1         |
| Category - Subcategory | Storage - Encryption      |
| Provider               | AZURE                     |
| Severity               | HIGH                      |
| Framework              | Terraform, Terraform Plan |

## Impact

Enable sensitive data encryption at rest using Customer Managed Keys (CMKs) rather than Microsoft Managed keys. By default, data in the storage account is encrypted using Microsoft Managed Keys at rest. All Azure Storage resources are encrypted, including blobs, disks, files, queues, and tables. All object metadata is also encrypted. However, if you want to control and manage this encryption key yourself, you can specify a customer-managed key, that key is used to protect and control access to the key that encrypts your data. You can also choose to automatically update the key version used for Azure Storage encryption whenever a new version is available in the associated Key Vault.

## How to Fix

## *Resource:* azurerm\_resource\_group, azurerm\_key\_vault, azurerm\_key\_vault\_access\_policy, azurerm\_key\_vault\_key, azurerm\_storage\_account, azurerm\_storage\_account\_customer\_managed\_key \[source,go]

data "azurerm\_client\_config" "current" {}

resource "azurerm\_resource\_group" "example" { name = "example-resources" location = "West Europe" }

resource "azurerm\_key\_vault" "example" { name = "examplekv" location = azurerm\_resource\_group.example.location resource\_group\_name = azurerm\_resource\_group.example.name tenant\_id = data.azurerm\_client\_config.current.tenant\_id sku\_name = "standard"

purge\_protection\_enabled = true }

resource "azurerm\_key\_vault\_access\_policy" "client" { key\_vault\_id = azurerm\_key\_vault.example.id tenant\_id = data.azurerm\_client\_config.current.tenant\_id object\_id = data.azurerm\_client\_config.current.object\_id

key\_permissions = \["Get", "Create", "Delete", "List", "Restore", "Recover", "UnwrapKey", "WrapKey", "Purge", "Encrypt", "Decrypt", "Sign", "Verify"] secret\_permissions = \["Get"] }

resource "azurerm\_key\_vault\_key" "example" { name = "tfex-key" key\_vault\_id = azurerm\_key\_vault.example.id key\_type = "RSA" key\_size = 2048 key\_opts = \["decrypt", "encrypt", "sign", "unwrapKey", "verify", "wrapKey"]

depends\_on = \[ azurerm\_key\_vault\_access\_policy.client ] }

resource "azurerm\_storage\_account" "ok\_storage\_account" { name = "examplestor" resource\_group\_name = azurerm\_resource\_group.example.name location = azurerm\_resource\_group.example.location account\_tier = "Standard" account\_replication\_type = "GRS"

identity { type = "SystemAssigned" } }

## resource "azurerm\_storage\_account\_customer\_managed\_key" "ok\_cmk" { storage\_account\_id = azurerm\_storage\_account.ok\_storage\_account.id key\_vault\_id = azurerm\_key\_vault.example.id key\_name = azurerm\_key\_vault\_key.example.name }


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