bugtraq - Re: /proc filesystem allows bypassing directory permissions on Linux

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Message-ID: <4AE5CB62.80407@lightwave.net.ru>
Date: Mon, 26 Oct 2009 19:16:34 +0300
From: Dan Yefimov <dan@...htwave.net.ru>
To: Casper.Dik@....com
Cc: Pavel Machek <pavel@....cz>,
	Matthew Bergin <matt.bergin@...mail.com>, bugtraq@...urityfocus.com
Subject: Re: /proc filesystem allows bypassing directory permissions on Linux

On 26.10.2009 18:30, Casper.Dik@....com wrote:
> In Solaris, you don't have permission to access a file in /proc/<pid>/fd unless
> you can control the process<pid>.
>
> $ ls -l /proc/1/fd
> /proc/1/fd: Permission denied
>
> If you can control<pid>, then clearly you have access the file anyway
> simply by controlling it using a debugger.
>
In Linux the same access rules apply.
-- 

Sincerely Your, Dan.