Az - Queue Storage

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Basic Information

O Azure Queue Storage é um serviço na plataforma de nuvem Azure da Microsoft projetado para enfileiramento de mensagens entre componentes de aplicação, permitindo comunicação assíncrona e desacoplamento. Ele permite armazenar um número ilimitado de mensagens, cada uma com até 64 KB de tamanho, e suporta operações como criar e excluir filas, adicionar, recuperar, atualizar e excluir mensagens, além de gerenciar metadados e políticas de acesso. Embora normalmente processe mensagens de maneira FIFO (first-in-first-out), a FIFO estrita não é garantida.

Enumeration

Bash

# You need to know the --account-name of the storage (az storage account list)
az storage queue list --account-name <storage_account>

# Queue Metadata
az storage queue metadata show --name <queue_name> --account-name <storage_account>

#Get ACL
az storage queue policy list --queue-name <queue_name> --account-name <storage_account>

# Get Messages (getting a message deletes it)
az storage message get --queue-name <queue_name> --account-name <storage_account>

# Peek Messages
az storage message peek --queue-name <queue_name> --account-name <storage_account>

PS

# Get the Storage Context
$storageAccount = Get-AzStorageAccount -ResourceGroupName QueueResourceGroup -Name queuestorageaccount1994
$ctx = $storageAccount.Context

# Set Variables for Storage Account
$storageAccountName = "queuestorageaccount"

# List Queues
Get-AzStorageQueue -Context $context
$queueName = "myqueue"

# Retrieve a specific queue
$queue = Get-AzStorageQueue -Name $queueName -Context $context
$queue # Show the properties of the queue

# Retrieve the access policies for the queue
$accessPolicies = Get-AzStorageQueueStoredAccessPolicy -Context $context -QueueName $queueName
$accessPolicies

# Peek Messages
$queueMessage = $queue.QueueClient.PeekMessage()
$queueMessage.Value

# Set the amount of time you want to entry to be invisible after read from the queue
# If it is not deleted by the end of this time, it will show up in the queue again
$visibilityTimeout = [System.TimeSpan]::FromSeconds(10)

# Read the messages from the queue, then show the contents of the messages.
$queueMessage = $queue.QueueClient.ReceiveMessages(1,$visibilityTimeout)
$queueMessage.Value

Escalação de Privilégios

Az - Queue Storage Privesc

Pós Exploração

Az - Queue Storage Post Exploitation

Persistência

Az - Queue Storage Persistence

Referências

• https://learn.microsoft.com/en-us/azure/storage/queues/storage-powershell-how-to-use-queues

• https://learn.microsoft.com/en-us/rest/api/storageservices/queue-service-rest-api

• https://learn.microsoft.com/en-us/azure/storage/queues/queues-auth-abac-attributes

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