Logic App 18 - Modify Workflow and Abuse Storage Queue

Modify Workflow and Abuse Storage Queue

信息

Scenario

Sometimes the user whom we compromised can have permission to edit the workflow of the logic app. Abuse the permission of the user on the logic and read the flag from the storage queue.

Overview

What is logic app workflow?

A logic app workflow is a visual representation and implementation of a business process or integration scenario in Azure Logic Apps. It defines the steps, actions, and conditions that are executed in a specific sequence to automate a particular workflow.

Hint

• make use of the queue connector actions.

Impact

• With appropriate permissions on the logic app we could manipulate the logic app to interact with other services and perform malicious activity.

Reference

• Logic Apps Docs
• Storage Queues Docs
• Azure Queue Connector

题目给出了 UserCreds 信息，直接登录，查看所有资源

跟前一题一样，着手编辑 Logic app 的执行流程

添加对 Azure 队列的操作

将获取的数据插入返回包中

保存对Logic app的修改之后，触发Logic app

Flags

Which storage queue logic app connector (ignore the version) did we use to fetch the flag? (Get blob content or Get Messages)

Get Messages

What is the flag value we obtain ?

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