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📝 Azure Storage Account Shared Key Access is not disabled 🟢

  • Contextual name: 📝 Shared Key Access is not disabled 🟢
  • ID: /ce/ca/azure/storage/disable-shared-key-access
  • Located in: 📁 Azure Storage

Flags​

Our Metadata​

  • Policy Type: BEST_PRACTICE
  • Policy Category:
    • SECURITY

Logic​

Description​

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Description​

Every secure request to an Azure Storage account must be authorized. By default, requests can be authorized with either Microsoft Entra credentials or by using the account access key for Shared Key authorization.

Rationale​

Microsoft Entra ID provides superior security and ease of use compared to Shared Key and is recommended by Microsoft. To require clients to use Microsoft Entra ID for authorizing requests, you can disallow requests to the storage account that are authorized with Shared Key.

Impact​

When you disallow Shared Key authorization for a storage account, any requests to the account that are authorized with Shared Key, including shared access signatures (SAS), will be denied. Client applications that currently access the storage account using the Shared Key will no longer function.

Audit​

This policy flags an Azure Storage Account as INCOMPLIANT if the Shared Key Access configuration is not set to Deny.

Default Value​

The AllowSharedKeyAccess property of a storage account is not set by default and does not return a value until you explicitly set it. The storage account permits requests that are authorized with the Shared Key when the property value is null or when it is true.

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Remediation​

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Remediation​

From Azure Portal​

  1. Go to Storage accounts.
  2. Click the name of a storage account.
  3. Under Settings, click Configuration.
  4. Under Allow storage account key access, click the radio button next to Disabled.
  5. Click Save.
  6. Repeat steps 1-5 for each storage account requiring remediation.

From Azure CLI​

For each storage account requiring remediation, run the following command to disallow shared key authorization:

az storage account update --resource-group <resource-group> --name <storage-account> --allow-shared-key-access false

From PowerShell​

For each storage account requiring remediation, run the following command to disallow shared key authorization:

Set-AzStorageAccount -ResourceGroupName <resource-group> -Name <storage-account> -AllowSharedKeyAccess $false

policy.yaml​

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Linked Framework Sections​

SectionSub SectionsInternal RulesPoliciesFlags
💼 CIS Azure v4.0.0 → 💼 10.3.1.3 Ensure 'Allow storage account key access' for Azure Storage Accounts is 'Disabled' (Automated)1
💼 Cloudaware Framework → 💼 Secure Access53