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

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Message-Id: <200910301913.n9UJDqWj023627@bari.maths.usyd.edu.au>
Date: Sat, 31 Oct 2009 06:13:52 +1100
From: psz@...hs.usyd.edu.au
To: marco@....nl, pavel@....cz
Cc: bugtraq@...urityfocus.com, dan@...htwave.net.ru, jim@...n.com
Subject: Re: /proc filesystem allows bypassing directory permissions on Linux

> ... another solution -- allow fcntl() to remove read-only and
> append-only limitations, so that behaviour is at least explicit.

Do not lower security, just to emulate /proc sloppiness. (That would be
like fixing a root security bug by doing away with the root password.)
Is there anything (currently) relying on that security?

Paul Szabo   psz@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of Sydney    Australia