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Date: Mon, 13 Aug 2012 17:55:31 +0200
From: "Jason A. Donenfeld" <>
To: Richard Miles <>
Subject: Re: OS X Local Root Exploit for Viscosity OpenVPN

On Mon, Aug 13, 2012 at 5:41 PM, Richard Miles
<> wrote:
> - Calls a file with a suid file without full path?


> - Allows to create a symbolic link inside
> /Applications/ with the name of
> ViscosityHelper?


> BTW, this file
> /Applications/ doesn't exist
> by default?

Yes, it does exist. When you run Viscosity for the first time, it
makes that file SUID.

> Also, are the permission at the folder
> /Applications/ week enough to allows anyone
> to write on it?

I don't know. It doesn't matter for this exploit.

> Sorry for dumb question, but what is the real issue here?

The SUID binary will execute python code from the directory of the
executable, linked, symlinked, or otherwise. Take a look at the

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