> 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/host-header/authentication-bypass-via-host-header.md).
# 通过 Host 头绕过身份验证
通过 Host 头绕过身份验证，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。
### Host 头认证绕过
**实验描述**
这个实验基于一个错误的服务端假设：用户权限级别是根据 HTTP 头的值来确定的 **主机**. / 通过处理这个头，可以访问仅供管理员使用的功能。
\*\* 目标：\*\*/ 进入管理面板并删除用户 **carlos**.
\*\* 观察到的初始行为\*\*
当尝试使用标准请求访问管理页面时，会被拒绝访问。
典型请求：
```http
GET /admin HTTP/2
Host: 0aa100b30336117186f29ede001a0029.web-security-academy.net
```
响应：未授权访问
**漏洞分析**
当请求来自被视为“内部”或可信的主机时，应用似乎会授予高权限，例如 **localhost**. / 不会执行额外验证来确认请求的实际来源。
```http
Host: 0aa100b30336117186f29ede001a0029.web-security-academy.net
```
**利用**
只需手动更改 **主机** HTTP 请求中的头值。
修改后的请求：
```http
Host: localhost
```
结果：已获授权访问管理面板
**最终操作**
一旦获得管理员访问权限，就可以删除目标用户：
```bash
/admin/delete?username=carlos
```
---
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