azureblog.co.uk
← cd ~/roles
// roles/azure · storage

Storage Actions Blob Data OperatorAzure built-in role

Used by the Storage Actions - Storage Task to list & perform operations on the Storage Account blobs

Role ID4bad4d9e-2a13-4888-94bb-c8432f6f3040
CategoryStorage
Actions6
Data actions8

Before you assign it

  • It reaches the data, not just the resource. It has 8 data actions, such as reading blobs, secrets or messages.

What it can do

PermissionWhat it allows
Microsoft.Authorization/*/readAny read operation on anything under Microsoft.Authorization
Microsoft.Insights/alertRules/*Every operation under Microsoft.Insights/alertRules
Microsoft.Resources/deployments/*Every operation under Microsoft.Resources/deployments
Microsoft.Resources/subscriptions/resourceGroups/readGets or lists resource groups.
Microsoft.Storage/storageAccounts/blobServices/containers/readReturns a container
Microsoft.Storage/storageAccounts/blobServices/containers/writeReturns the result of patch blob container

Data actions

PermissionWhat it allows
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/readReturns a blob or a list of blobs
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/writeReturns the result of writing a blob
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/deleteReturns the result of deleting a blob
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/add/actionReturns the result of adding blob content
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags/readReturns the result of reading blob tags
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/tags/writeReturns the result of writing blob tags
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/runAsSuperUser/actionReturns the result of the blob command
Microsoft.Storage/storageAccounts/blobServices/containers/blobs/immutableStorage/runAsSuperUser/action

Assign it

Scope it as tightly as you can: a resource or resource group rather than the whole subscription.

azure cli
az role assignment create \
  --assignee "jane.doe@contoso.com" \
  --role "Storage Actions Blob Data Operator" \
  --scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
powershell3 lines
New-AzRoleAssignment -SignInName "jane.doe@contoso.com" `
  -RoleDefinitionName "Storage Actions Blob Data Operator" `
  -Scope "/subscriptions/<subscription id>/resourceGroups/<resource group>"
bicep7 lines
resource assignment 'Microsoft.Authorization/roleAssignments@2022-04-01' = {
  name: guid(resourceGroup().id, principalId, '4bad4d9e-2a13-4888-94bb-c8432f6f3040')
  properties: {
    roleDefinitionId: subscriptionResourceId('Microsoft.Authorization/roleDefinitions', '4bad4d9e-2a13-4888-94bb-c8432f6f3040')
    principalId: principalId
  }
}

Who already has it?

kql · azure resource graph
authorizationresources
| where type == "microsoft.authorization/roleassignments"
| where tostring(properties.roleDefinitionId) endswith "4bad4d9e-2a13-4888-94bb-c8432f6f3040"
| project principalId = tostring(properties.principalId), principalType = tostring(properties.principalType), scope = tostring(properties.scope)

Other storage roles

Find the smallest role for a task →

Sources