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Ensure the 'Minimum TLS version' for storage accounts is set to 'Version 1.2'
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Based on SOC occupation classification
| name | cis-azure-storage-17.11 |
| description | Ensure the 'Minimum TLS version' for storage accounts is set to 'Version 1.2' |
| category | cis-azure-storage |
| version | 1.0.0 |
| author | cyberstrike-official |
| tags | ["cis","azure","storage","storage-accounts","tls"] |
| cis_id | 17.11 |
| cis_benchmark | CIS Microsoft Azure Storage Services Benchmark v1.0.0 |
| tech_stack | ["azure"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
In some cases, Azure Storage sets the minimum TLS version to be version 1.0 by default. TLS 1.0 is a legacy version and has known vulnerabilities. This minimum TLS version can be configured to be later protocols such as TLS 1.2.
TLS 1.0 has known vulnerabilities and has been replaced by later versions of the TLS protocol. Continued use of this legacy protocol affects the security of data in transit.
When set to TLS 1.2 all requests must leverage this version of the protocol. Applications leveraging legacy versions of the protocol will fail.
Storage Accounts.Settings, click Configuration.Minimum TLS version is set to Version 1.2.Get a list of all storage accounts and their resource groups:
az storage account list | jq '.[] | {name, resourceGroup}'
Then query the minimumTLSVersion field:
az storage account show \
--name <storage-account> \
--resource-group <resource-group> \
--query minimumTlsVersion \
--output tsv
To get the minimum TLS version, run the following command:
(Get-AzStorageAccount -Name <STORAGEACCOUNTNAME> -ResourceGroupName <RESOURCEGROUPNAME>).MinimumTlsVersion
Policy ID: fe83a0eb-a853-422d-aac2-1bffd182c5d0 - Name: 'Storage accounts should have the specified minimum TLS version'
The Minimum TLS version should be set to Version 1.2 (or TLS1_2 in CLI output) for all storage accounts.
Storage Accounts.Settings, click Configuration.Minimum TLS version to Version 1.2.Save.az storage account update \
--name <storage-account> \
--resource-group <resource-group> \
--min-tls-version TLS1_2
To set the minimum TLS version, run the following command:
Set-AzStorageAccount -AccountName <STORAGEACCOUNTNAME> `
-ResourceGroupName <RESOURCEGROUPNAME> `
-MinimumTlsVersion TLS1_2
If a storage account is created through the portal, the MinimumTlsVersion property for that storage account will be set to TLS 1.2.
If a storage account is created through PowerShell or CLI, the MinimumTlsVersion property for that storage account will not be set, and defaults to TLS 1.0.
Level 1 | Automated