🛡️ Azure App Service does not use Azure Key Vaults to store secrets🟢⚪

• Contextual name: 🛡️ App Service does not use Azure Key Vaults to store secrets🟢⚪
• ID: /ce/ca/azure/app-service/use-key-vaults-to-store-secrets
• Tags:
  • ⚪ Impossible policy
  • 🟢 Policy with categories
  • 🟢 Policy with type
• Policy Type: COMPLIANCE_POLICY
• Policy Categories: SECURITY

Similar Policies

• Cloud Conformity: Use Key Vaults to Store App Service Application Secrets

Description

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Description

Azure Key Vault will store multiple types of sensitive information such as encryption keys, certificate thumbprints, and Managed Identity Credentials. Access to these 'Secrets' can be controlled through granular permissions.

Rationale

The credentials given to an application have permissions to create, delete, or modify data stored within the systems they access. If these credentials are stored within the application itself, anyone with access to the application or a copy of the code has access to them. Storing within Azure Key Vault as secrets increases security by controlling access. This also allows for updates of the credentials without redeploying the entire application.

Impact

Integrating references to secrets within the key vault are required to be specifically integrated within the application code. This will require additional configuration to be made during the writing of an application, or refactoring of an already written one. There are also additional costs that are charged per 10000 requests to the Key Vault.

... see more

Remediation

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Remediation

Remediation has 2 steps

1. Setup the Key Vault.
2. Setup the App Service to use the Key Vault.

Step 1: Set up the Key Vault

From Azure CLI

az keyvault create --name "<name>" --resource-group "<myResourceGroup>" --location myLocation

From Powershell

New-AzKeyvault -name <name> -ResourceGroupName <myResourceGroup> -Location <myLocation>

Step 2: Set up the App Service to use the Key Vault

Sample JSON Template for App Service Configuration:

{ 
    //... 
    "resources": [ 
        { 
            "type": "Microsoft.Storage/storageAccounts", 
            "name": "[variables('storageAccountName')]", 
            //... 
        }, 
        { 
            "type": "Microsoft.Insights/components", 
            "name": "[variables('appInsightsName')]", 
            //... 
        }, 
        { 
            "type": "Microsoft.Web/sites", 
            "name": "[variables('functionAppName')]", 
            "identity": { 
                "type": "SystemAssigned" }, 
                //... 
            "resources": [

... [see more](remediation.md)

policy.yaml

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Linked Framework Sections

Section	Sub Sections	Internal Rules	Policies	Flags	Compliance
💼 CIS Azure v2.1.0 → 💼 9.10 Ensure Azure Key Vaults are Used to Store Secrets - Level 2 (Manual)			1		no data
💼 CIS Azure v3.0.0 → 💼 9.11 Ensure Azure Key Vaults are Used to Store Secrets (Manual)			1		no data
💼 Cloudaware Framework → 💼 Data Encryption			44		no data