Ensure 'SMB channel encryption' is set to 'AES-256-GCM' or higher for SMB file shares (Classic File Shares)

AltaNível 1Revisão manualazure

Descrição

Note: This recommendation applies to Classic File Shares (Azure file shares hosted in a storage account, the Microsoft.Storage provider). Implement SMB channel encryption with AES-256-GCM for SMB file shares to ensure data confidentiality and integrity in transit. This method offers strong protection against eavesdropping and man-in-the-middle attacks, safeguarding sensitive information. AES-256-GCM encryption enhances the security of data transmitted over SMB channels by safeguarding it from unauthorized interception and tampering.

Como é verificado

Método de auditoria: Revisão manual

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Audit from Azure Portal 1. Go to Storage accounts. 2. Click the name of a storage account. 3. Under Data storage, click File shares. 4. Under File share settings, click the link next to Security. 5. Under SMB channel encryption, ensure that AES-256-GCM, or higher, is the only checked SMB channel encryption setting. 6. Repeat steps 1-5 for each storage account. Audit from Azure CLI Run the following command to list storage accounts: az storage account list For each storage account, run the following command: az storage account file-service-properties show --resource-group <resource- group> --account-name <storage-account> Ensure that under protocolSettings > smb, channelEncryption is set to AES-256- GCM;, or higher, only. Audit from PowerShell Run the following command to list storage accounts: Get-AzStorageAccount Run the following command to get the file service properties for a storage account in a resource group with a given name: $storageaccountfileservice = Get-AzStorageFileServiceProperty - ResourceGroupName <resource-group> -AccountName <storage-account> Run the following command to get the SMB channel encryption setting: $storageaccountfileservice.ProtocolSettings.Smb.Ch...

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

Remediate from Azure Portal 1. Go to Storage accounts. 2. Click the name of a storage account. 3. Under Data storage, click File shares. 4. Under File share settings, click the link next to Security. 5. If Profile is set to Maximum compatibility, click the drop-down menu and select Maximum security or Custom. 6. If selecting Custom, under SMB channel encryption, uncheck the boxes next to AES-128-CCM and AES-128-GCM. 7. Click Save. 8. Repeat steps 1-7 for each storage account requiring remediation. Remediate from Azure CLI For each storage account requiring remediation, run the following command to set the SMB channel encryption: az storage account file-service-properties update --resource-group <resource- group> --account-name <storage-account> --channel-encryption AES-256-GCM Remediate from PowerShell For each storage account requiring remediation, run the following command to set the SMB channel encryption: Update-AzStorageFileServiceProperty -ResourceGroupName <resource-group> - StorageAccountName <storage-account> -SmbChannelEncryption AES-256-GCM

Propriedades

Sistemas operacionais: Qualquer
Tags: azurecloudencryptionstorage
Referência: CIS Microsoft Azure Storage Services Benchmark v2.0.0 - 7.2.2 Ensure 'SMB channel encryption' is set to 'AES-256-GCM' or higher for SMB file shares (Classic File Shares)