linux-ext4 - Re: generic question: user-only directory w/o root access

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 6 Jun 2015 11:42:09 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"U.Mutlu" <for-gmane@...luit.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: generic question: user-only directory w/o root access

On Sat, Jun 06, 2015 at 09:19:40AM +0200, U.Mutlu wrote:
> I posted hello.c (a FUSE demo) in this thread. It is IMO even more secure
> than the private namespace mount method. The simple reason is:
> because granting access to the volume (or to a single dir/file)
> is done inside that user-code itself, ie. the user/owner controls
> whom he actually gives access.
> I'm sorry to say this, but this simply proves your last statement above wrong.

So the root user ptraces the FUSE daemon, and it's all she wrote.

							- Ted
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html