Fixed Azure.Storage.SecureTransfer Azure#2414 (Azure#2416)

Author: BernieWhite

docs/CHANGELOG-v1.md

@@ -29,6 +29,9 @@ What's changed since pre-release v1.30.0-B0047:
 - Engineering:
   - Bump Microsoft.NET.Test.Sdk to v17.7.2.
     [#2407](https://github.com/Azure/PSRule.Rules.Azure/pull/2407)
+- Bug fixes:
+  - Fixed false positive with `Azure.Storage.SecureTransfer` on new API versions by @BernieWhite.
+    [#2414](https://github.com/Azure/PSRule.Rules.Azure/issues/2414)
 
 ## v1.30.0-B0047 (pre-release)
 

docs/en/rules/Azure.Storage.SecureTransfer.md

@@ -1,4 +1,5 @@
 ---
+reviewed: 2023-09-02
 severity: Important
 pillar: Security
 category: Encryption
@@ -23,6 +24,9 @@ To do this set the _Secure transfer required_ option.
 When _secure transfer required_ is enabled,
 attempts to connect to storage using HTTP or unencrypted SMB connections are rejected.
 
+Storage Accounts that are deployed with a newer API version will have this option enabled by default.
+However, this does not prevent the option from being disabled.
+
 ## RECOMMENDATION
 
 Storage accounts should only accept secure traffic.
@@ -35,59 +39,72 @@ Also consider using Azure Policy to audit or enforce this configuration.
 
 To deploy Storage Accounts that pass this rule:
 
-- Set the `properties.supportsHttpsTrafficOnly` property to `true`.
+- For API versions older then _2019-04-01_, set the `properties.supportsHttpsTrafficOnly` property to `true`.
+- For API versions _2019-04-01_ and newer:
+  - Omit the `properties.supportsHttpsTrafficOnly` property OR
+  - Explicitly set the `properties.supportsHttpsTrafficOnly` property to `true`.
 
 For example:
 
 ```json
 {
-    "comments": "Storage Account",
-    "type": "Microsoft.Storage/storageAccounts",
-    "apiVersion": "2019-06-01",
-    "name": "st0000001",
-    "location": "[parameters('location')]",
-    "sku": {
-        "name": "Standard_GRS",
-        "tier": "Standard"
-    },
-    "kind": "StorageV2",
-    "properties": {
-        "supportsHttpsTrafficOnly": true,
-        "minimumTlsVersion": "TLS1_2",
-        "allowBlobPublicAccess": false,
-        "accessTier": "Hot"
+  "type": "Microsoft.Storage/storageAccounts",
+  "apiVersion": "2023-01-01",
+  "name": "[parameters('name')]",
+  "location": "[parameters('location')]",
+  "sku": {
+    "name": "Standard_GRS"
+  },
+  "kind": "StorageV2",
+  "properties": {
+    "allowBlobPublicAccess": false,
+    "supportsHttpsTrafficOnly": true,
+    "minimumTlsVersion": "TLS1_2",
+    "accessTier": "Hot",
+    "allowSharedKeyAccess": false,
+    "networkAcls": {
+      "defaultAction": "Deny"
     }
+  }
 }
 ```
 
 ### Configure with Bicep
 
 To deploy Storage Accounts that pass this rule:
 
-- Set the `properties.supportsHttpsTrafficOnly` property to `true`.
+- For API versions older then _2019-04-01_, set the `properties.supportsHttpsTrafficOnly` property to `true`.
+- For API versions _2019-04-01_ and newer:
+  - Omit the `properties.supportsHttpsTrafficOnly` property OR
+  - Explicitly set the `properties.supportsHttpsTrafficOnly` property to `true`.
 
 For example:
 
 ```bicep
-resource st0000001 'Microsoft.Storage/storageAccounts@2021-04-01' = {
-  name: 'st0000001'
+resource storageAccount 'Microsoft.Storage/storageAccounts@2023-01-01' = {
+  name: name
   location: location
   sku: {
     name: 'Standard_GRS'
   }
   kind: 'StorageV2'
   properties: {
-    supportsHttpsTrafficOnly: true
-    accessTier: 'Hot'
     allowBlobPublicAccess: false
+    supportsHttpsTrafficOnly: true
     minimumTlsVersion: 'TLS1_2'
+    accessTier: 'Hot'
+    allowSharedKeyAccess: false
+    networkAcls: {
+      defaultAction: 'Deny'
+    }
   }
 }
 ```
 
 ## LINKS
 
 - [Data encryption in Azure](https://learn.microsoft.com/azure/architecture/framework/security/design-storage-encryption#data-in-transit)
-- [Require secure transfer in Azure Storage](https://docs.microsoft.com/azure/storage/common/storage-require-secure-transfer)
-- [Sample policy for ensuring https traffic](https://docs.microsoft.com/azure/governance/policy/samples/ensure-https-stor-acct)
-- [Azure deployment reference](https://docs.microsoft.com/azure/templates/microsoft.storage/storageaccounts)
+- [Require secure transfer in Azure Storage](https://learn.microsoft.com/azure/storage/common/storage-require-secure-transfer)
+- [DP-3: Encrypt sensitive data in transit](https://learn.microsoft.com/security/benchmark/azure/baselines/storage-security-baseline#dp-3-encrypt-sensitive-data-in-transit)
+- [Sample policy for ensuring https traffic](https://learn.microsoft.com/azure/governance/policy/samples/built-in-policies#storage)
+- [Azure deployment reference](https://learn.microsoft.com/azure/templates/microsoft.storage/storageaccounts)

docs/examples-storage.bicep

@@ -16,7 +16,7 @@ var containerName = 'data'
 var shareName = 'group'
 
 // An example Storage Account
-resource storageAccount 'Microsoft.Storage/storageAccounts@2021-06-01' = {
+resource storageAccount 'Microsoft.Storage/storageAccounts@2023-01-01' = {
   name: name
   location: location
   sku: {
@@ -36,7 +36,7 @@ resource storageAccount 'Microsoft.Storage/storageAccounts@2021-06-01' = {
 }
 
 // Configure blob services
-resource blobService 'Microsoft.Storage/storageAccounts/blobServices@2021-06-01' = {
+resource blobService 'Microsoft.Storage/storageAccounts/blobServices@2023-01-01' = {
   parent: storageAccount
   name: 'default'
   properties: {
@@ -52,7 +52,7 @@ resource blobService 'Microsoft.Storage/storageAccounts/blobServices@2021-06-01'
 }
 
 // An example container
-resource container 'Microsoft.Storage/storageAccounts/blobServices/containers@2021-06-01' = {
+resource container 'Microsoft.Storage/storageAccounts/blobServices/containers@2023-01-01' = {
   parent: blobService
   name: containerName
   properties: {
@@ -61,7 +61,7 @@ resource container 'Microsoft.Storage/storageAccounts/blobServices/containers@20
 }
 
 // Configure file services
-resource fileServices 'Microsoft.Storage/storageAccounts/fileServices@2021-06-01' = {
+resource fileServices 'Microsoft.Storage/storageAccounts/fileServices@2023-01-01' = {
   parent: storageAccount
   name: 'default'
   properties: {
@@ -72,7 +72,7 @@ resource fileServices 'Microsoft.Storage/storageAccounts/fileServices@2021-06-01
   }
 }
 
-resource share 'Microsoft.Storage/storageAccounts/fileServices/shares@2021-06-01' = {
+resource share 'Microsoft.Storage/storageAccounts/fileServices/shares@2023-01-01' = {
   parent: fileServices
   name: shareName
   properties: {

docs/examples-storage.json

@@ -1,11 +1,13 @@
 {
   "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
+  "languageVersion": "1.10-experimental",
   "contentVersion": "1.0.0.0",
   "metadata": {
+    "_EXPERIMENTAL_WARNING": "Symbolic name support in ARM is experimental, and should be enabled for testing purposes only. Do not enable this setting for any production usage, or you may be unexpectedly broken at any time!",
     "_generator": {
       "name": "bicep",
-      "version": "0.4.1124.51302",
-      "templateHash": "4901265845278602446"
+      "version": "0.20.4.51522",
+      "templateHash": "6814134128727565933"
     }
   },
   "parameters": {
@@ -27,10 +29,10 @@
     "containerName": "data",
     "shareName": "group"
   },
-  "resources": [
-    {
+  "resources": {
+    "storageAccount": {
       "type": "Microsoft.Storage/storageAccounts",
-      "apiVersion": "2021-06-01",
+      "apiVersion": "2023-01-01",
       "name": "[parameters('name')]",
       "location": "[parameters('location')]",
       "sku": {
@@ -48,9 +50,9 @@
         }
       }
     },
-    {
+    "blobService": {
       "type": "Microsoft.Storage/storageAccounts/blobServices",
-      "apiVersion": "2021-06-01",
+      "apiVersion": "2023-01-01",
       "name": "[format('{0}/{1}', parameters('name'), 'default')]",
       "properties": {
         "deleteRetentionPolicy": {
@@ -63,24 +65,23 @@
         }
       },
       "dependsOn": [
-        "[resourceId('Microsoft.Storage/storageAccounts', parameters('name'))]"
+        "storageAccount"
       ]
     },
-    {
+    "container": {
       "type": "Microsoft.Storage/storageAccounts/blobServices/containers",
-      "apiVersion": "2021-06-01",
+      "apiVersion": "2023-01-01",
       "name": "[format('{0}/{1}/{2}', parameters('name'), 'default', variables('containerName'))]",
       "properties": {
         "publicAccess": "None"
       },
       "dependsOn": [
-        "[resourceId('Microsoft.Storage/storageAccounts/blobServices', parameters('name'), 'default')]",
-        "[resourceId('Microsoft.Storage/storageAccounts', parameters('name'))]"
+        "blobService"
       ]
     },
-    {
+    "fileServices": {
       "type": "Microsoft.Storage/storageAccounts/fileServices",
-      "apiVersion": "2021-06-01",
+      "apiVersion": "2023-01-01",
       "name": "[format('{0}/{1}', parameters('name'), 'default')]",
       "properties": {
         "shareDeleteRetentionPolicy": {
@@ -89,20 +90,19 @@
         }
       },
       "dependsOn": [
-        "[resourceId('Microsoft.Storage/storageAccounts', parameters('name'))]"
+        "storageAccount"
       ]
     },
-    {
+    "share": {
       "type": "Microsoft.Storage/storageAccounts/fileServices/shares",
-      "apiVersion": "2021-06-01",
+      "apiVersion": "2023-01-01",
       "name": "[format('{0}/{1}/{2}', parameters('name'), 'default', variables('shareName'))]",
       "properties": {
         "accessTier": "TransactionOptimized"
       },
       "dependsOn": [
-        "[resourceId('Microsoft.Storage/storageAccounts/fileServices', parameters('name'), 'default')]",
-        "[resourceId('Microsoft.Storage/storageAccounts', parameters('name'))]"
+        "fileServices"
       ]
     }
-  ]
+  }
 }

src/PSRule.Rules.Azure/rules/Azure.Storage.Rule.yaml

@@ -54,17 +54,24 @@ metadata:
   name: Azure.Storage.SecureTransfer
   ref: AZR-000196
   tags:
-    release: 'GA'
-    ruleSet: '2020_06'
-    Azure.WAF/pillar: 'Security'
+    release: GA
+    ruleSet: 2020_06
+    Azure.WAF/pillar: Security
   labels:
-    Azure.MCSB.v1/control: 'DP-3'
+    Azure.MCSB.v1/control: DP-3
 spec:
   type:
   - Microsoft.Storage/storageAccounts
   condition:
-    field: properties.supportsHttpsTrafficOnly
-    equals: true
+    anyOf:
+      - allOf:
+        - field: apiVersion
+          apiVersion: '>=2019-04-01'
+        - field: properties.supportsHttpsTrafficOnly
+          hasDefault: true
+      - allOf:
+        - field: properties.supportsHttpsTrafficOnly
+          equals: true
 
 ---
 # Synopsis: Disallow blob containers with public access types.

tests/PSRule.Rules.Azure.Tests/Resources.Storage.Template.json

@@ -99,7 +99,7 @@
         {
             "comments": "Storage Account",
             "type": "Microsoft.Storage/storageAccounts",
-            "apiVersion": "2019-06-01",
+            "apiVersion": "2022-09-01",
             "name": "[parameters('storageAccountName')]",
             "location": "[parameters('location')]",
             "sku": {
@@ -116,7 +116,6 @@
                     ],
                     "defaultAction": "Deny"
                 },
-                "supportsHttpsTrafficOnly": true,
                 "encryption": {
                     "services": {
                         "file": {