> 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
### 主机头认证绕过
**实验说明**
这个实验基于一个错误的服务器端假设：用户权限级别是根据 HTTP 头的值来确定的 **Host**。/ 通过处理这个头，可以访问仅限管理员使用的功能。
\*\*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，访问被拒绝。
普通请求：
```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真实来源。
```http
Host: 0aa100b30336117186f29ede001a0029.web-security-academy.net
```
**利用**
只需手动修改 **Host** HTTP 请求中的头部值。
修改后的请求：
```http
Host: localhost
```
结果：已获准访问管理面板
**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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