full-disclosure - [FD] Viscosity for Windows 1.6.7 Privilege Escalation

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Message-ID: <CACoXDXhTNvMoOvJ_geqVL7qCzj4ajEKxO2KBEg86B3_qQHxhbg@mail.gmail.com>
Date: Tue, 31 Jan 2017 14:22:15 +0100
From: Kacper Szurek <kacperszurek@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Viscosity for Windows 1.6.7 Privilege Escalation

# Exploit Title: Viscosity for Windows 1.6.7 Privilege Escalation
# Date: 31.01.2017
# Software Link: https://www.sparklabs.com/
# Exploit Author: Kacper Szurek
# Contact: https://twitter.com/KacperSzurek
# Website: https://security.szurek.pl/
# Category: local

1. Description

It is possible to execute openvpn with custom dll as SYSTEM using
ViscosityService because path is not correctly validated.

https://security.szurek.pl/viscosity-for-windows-167-privilege-escalation.html

2. Proof of Concept

https://github.com/kacperszurek/exploits/tree/master/Viscosity

3. Solution

Update to version 1.6.8

https://www.sparklabs.com/blog/viscosity-for-mac-windows-version-1-6-8/

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