> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/zh/web/business-logic/failed-state-machine-workaround.md).
# 有缺陷的状态机变通方法
有缺陷的状态机变通方法，PortSwigger Web Security Academy 实验笔记，包括利用流程、载荷测试、Burp Suite 验证以及修复上下文。
### 通过有缺陷的状态机绕过身份验证
本实验基于对身份验证流程步骤顺序的错误假设。利用这个设计不佳的状态机，可以绕过身份验证，访问管理界面并删除用户 **carlos**.
提供的标识符：
* **用户：** wiener
* **密码：** peter
**主要观察**
连接流程被拆分为几个连续步骤，包括一个中间的角色选择步骤。
应用程序假定所有步骤都按顺序执行，并且每个请求在进入下一步之前都已正确验证。
**操作阶段**
1. 使用有效的 `wiener:peter` 凭据。
2. 登录后，应用程序会提供一个 **角色选择**.
* 点击前进以继续。
* 在向 **角色选择器**发出 GET 请求时，拦截该请求。
**不要让请求通过**：阻止或删除它（drop）。
* 正是在这个阶段进行角色验证。
在没有进行此验证的情况下继续流程。
**结果**
应用程序错误地认为所有步骤都已正确验证。/ 用户直接访问 \*\*管理面板\*\*，而没有选择或验证合法的角色。
从那里可以删除用户 **carlos** 并验证实验。
---
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