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

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Message-ID: <20091026183738.GA30427@mail.planetcobalt.net>
Date: Mon, 26 Oct 2009 19:37:38 +0100
From: Ansgar Wiechers <bugtraq@...netcobalt.net>
To: bugtraq@...urityfocus.com
Subject: Re: /proc filesystem allows bypassing directory permissions on
	Linux

On 2009-10-24 Derek Martin wrote:
> 1. It circumvents the fact that to write to a file, you MUST be able
> to write to its directory, so that the file attributes can be updated.

Wrong, because the file's attributes aren't stored in the directory, but
in the respective inode.

Regards
Ansgar Wiechers
-- 
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq