> 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/command-injection/basic-os-command-injection.md).

# Inyección básica de comandos del SO

Notas de Inyección básica de comandos del SO para laboratorios de PortSwigger Web Security Academy, incluido el flujo de explotación, pruebas de payloads, validación con Burp Suite y contexto de remediación.

### Inyección de comandos del sistema operativo

Este laboratorio presenta una vulnerabilidad de inyección de comandos del sistema en la herramienta de verificación de stock de un producto. / La aplicación ejecuta un comando de shell que incluye las credenciales del producto y de la tienda proporcionadas por el usuario, y luego devuelve directamente en la respuesta la salida en bruto de este comando.

El objetivo del laboratorio es ejecutar el **whoami** comando para identificar el nombre del usuario actual.

Observamos que, en Linux, cuando introduces un comando como:

```bash
pwd
```

es posible encadenar varios comandos usando un punto y coma:

```bash
pwd;whoami
```

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-11f033fc0aa69f9f40e99223e74cd4a72504165b%2Fimage%20(308).png?alt=media" alt="" width="563"><figcaption></figcaption></figure>

En este caso, se transmiten dos parámetros.

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-19e22ecdff5f70678283c25819597dafd5fbbf2e%2Fimage%20(309).png?alt=media" alt="" width="563"><figcaption></figcaption></figure>

Si se inserta un **;** en uno u otro, se puede ejecutar un comando arbitrario porque el backend utiliza una función del tipo **system**.

Ejemplo:

```bash
productId=1&storeId=1;ls -l
```

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-0be5668339de6443bdbabd36144f5de5e100be25%2Fimage%20(310).png?alt=media" alt=""><figcaption></figcaption></figure>


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