From: Mathieu Chouquet-Stringer <mathieu@newview.com>
To: lisanels@cableone.net ("Lisa R. Nelson")
Cc: linux-kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: File Permissions are incorrect. Security flaw in Linux
Date: 01 Oct 2003 09:08:30 -0400 [thread overview]
Message-ID: <xltr81x14xd.fsf@shookay.newview.com> (raw)
In-Reply-To: <1065012013.4078.2.camel@lisaserver>
lisanels@cableone.net ("Lisa R. Nelson") writes:
> [1.] One line summary of the problem:
> A low level user can delete a file owned by root and belonging to group
> root even if the files permissions are 744. This is not in agreement
> with Unix, and is a major security issue.
That's perfectly normal, the directory where you put your files is writable
by anyone and that's what matters. To remove a file, you don't need
permission on the file but on the container, which is the directory in your
case.
Make the directory 1777 instead of 777 or try the same thing under /tmp.
--
Mathieu Chouquet-Stringer E-Mail : mathieu@newview.com
Never attribute to malice that which can be adequately
explained by stupidity.
-- Hanlon's Razor --
next prev parent reply other threads:[~2003-10-01 13:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-01 12:40 File Permissions are incorrect. Security flaw in Linux Lisa R. Nelson
2003-10-01 13:08 ` Måns Rullgård
2003-10-01 13:08 ` Mathieu Chouquet-Stringer [this message]
2003-10-01 13:23 ` viro
[not found] ` <1065017722.2995.10.camel@localhost.localdomain>
2003-10-01 15:40 ` viro
2003-10-01 19:27 ` DervishD
2003-10-01 13:53 ` Jurjen Oskam
2003-10-01 14:09 ` Richard B. Johnson
2003-10-01 14:22 ` Andreas Schwab
2003-10-01 15:01 ` John Bradford
2003-10-01 13:58 ` Felipe Alfaro Solana
2003-10-01 14:21 ` DervishD
[not found] ` <1065044031.2158.23.camel@wynken.reefedge.com>
2003-10-01 14:37 ` Lisa R. Nelson
2003-10-01 15:11 ` Bas Mevissen
2003-10-01 15:12 ` Randy.Dunlap
2003-10-01 16:08 ` Richard B. Johnson
2003-10-01 19:21 ` DervishD
2003-10-01 20:30 ` viro
2003-10-01 17:23 ` Brett
2003-10-01 19:24 ` DervishD
2003-10-02 10:32 ` Christian
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