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📝 Azure Storage Account Public Network Access is not disabled 🟢

  • Contextual name: 📝 Public Network Access is not disabled 🟢
  • ID: /ce/ca/azure/storage/disable-public-network-access
  • Located in: 📁 Azure Storage

Flags​

Our Metadata​

  • Policy Type: COMPLIANCE_POLICY
  • Policy Category:
    • SECURITY

Similar Policies​

Logic​

Description​

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Description​

Disallowing public network access for a storage account overrides the public access settings for individual containers in that storage account for Azure Resource Manager Deployment Model storage accounts. Azure Storage accounts that use the classic deployment model will be retired on August 31, 2024.

Rationale​

The default network configuration for a storage account permits a user with appropriate permissions to configure public network access to containers and blobs in a storage account. Keep in mind that public access to a container is always turned off by default and must be explicitly configured to permit anonymous requests. It grants read-only access to these resources without sharing the account key, and without requiring a shared access signature. It is recommended not to provide public network access to storage accounts until, and unless, it is strongly desired. A shared access signature token or Azure AD RBAC should be used for providing controlled and timed access to blob containers.

Impact​

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Remediation​

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Remediation​

From Azure Portal​

First, follow Microsoft documentation and create shared access signature tokens for your blob containers. Then:

  1. Go to Storage Accounts.
  2. For each storage account, under the Security + networking section, click Networking.
  3. Set Public Network Access to Disabled.
  4. Click Save.

From Azure CLI​

Set Public Network Access to Disabled on the storage account:

az storage account update --name <storage-account> --resource-group <resource-group> --public-network-access Disabled

From PowerShell​

For each Storage Account, run the following to set the PublicNetworkAccess setting to Disabled:

Set-AzStorageAccount -ResourceGroupName <resource group name> -Name <storage account name> -PublicNetworkAccess Disabled

policy.yaml​

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Linked Framework Sections​

SectionSub SectionsInternal RulesPoliciesFlags
💼 CIS Azure v2.1.0 → 💼 3.7 Ensure that 'Public Network Access' is `Disabled' for storage accounts - Level 1 (Automated)1
💼 CIS Azure v3.0.0 → 💼 4.6 Ensure that 'Public Network Access' is 'Disabled' for storage accounts (Automated)1
💼 Cloudaware Framework → 💼 Public and Anonymous Access24