From: John Bradford <john@grabjohn.com>
To: mingo@redhat.com (Ingo Molnar)
Cc: arjanv@redhat.com (Arjan van de Ven),
davidel@xmailserver.org (Davide Libenzi),
linux-kernel@vger.kernel.org (Linux Kernel Mailing List)
Subject: Re: [Announcement] "Exec Shield", new Linux security feature
Date: Fri, 2 May 2003 19:29:38 +0100 (BST) [thread overview]
Message-ID: <200305021829.h42ITclA000178@81-2-122-30.bradfords.org.uk> (raw)
In-Reply-To: <Pine.LNX.4.44.0305021325130.6565-100000@devserv.devel.redhat.com> from "Ingo Molnar" at May 02, 2003 01:32:20 PM
> > > Ingo, do you want protection against shell code injection ? Have the
> > > kernel to assign random stack addresses to processes and they won't be
> > > able to guess the stack pointer to place the jump. I use a very simple
> > > trick in my code :
> >
> > stack randomisation is already present in the kernel, in the form of
> > cacheline coloring for HT cpus...
>
> we could make it even more prominent than just coloring, to introduce the
> kind of variability that Davide's approach introduces. It has to be a
> separate patch obviously. This would further reduce the chance that a
> remote attack that has to guess the stack would succeed on a random box.
Slightly off-topic, but does anybody know whether IA64 or x86-64 allow
you to make the stack non-executable in the same way you can on SPARC?
John.
next prev parent reply other threads:[~2003-05-02 18:13 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-02 16:37 [Announcement] "Exec Shield", new Linux security feature Ingo Molnar
2003-05-02 17:05 ` Matthias Andree
2003-05-02 17:12 ` Marc-Christian Petersen
2003-05-02 17:12 ` Davide Libenzi
2003-05-02 17:18 ` Arjan van de Ven
2003-05-02 17:32 ` Ingo Molnar
2003-05-02 18:29 ` John Bradford [this message]
2003-05-02 18:32 ` H. Peter Anvin
2003-05-02 19:09 ` David Mosberger
2003-05-02 18:51 ` Davide Libenzi
[not found] ` <20030502172011$0947@gated-at.bofh.it>
2003-05-02 18:17 ` Florian Weimer
2003-05-02 18:29 ` Davide Libenzi
2003-05-02 18:32 ` Florian Weimer
2003-05-02 18:50 ` Davide Libenzi
2003-05-02 21:48 ` Carl-Daniel Hailfinger
2003-05-03 6:52 ` Ingo Molnar
2003-05-03 9:56 ` Carl-Daniel Hailfinger
2003-05-03 12:48 ` Arjan van de Ven
2003-05-04 6:52 ` Calin A. Culianu
2003-05-04 8:10 ` Ingo Molnar
2003-05-04 8:52 ` Ingo Molnar
2003-05-04 15:40 ` Calin A. Culianu
2003-05-04 15:48 ` Sean Neakums
2003-05-04 15:23 ` Calin A. Culianu
2003-05-04 20:07 ` H. Peter Anvin
2003-05-04 20:57 ` Kasper Dupont
2003-05-05 16:20 ` [patch] exec-shield-2.4.21-rc1-C5 Ingo Molnar
[not found] <Pine.LNX.4.44.0305021325130.6565-100000@devserv.devel.redhat.com.suse.lists.linux.kernel>
[not found] ` <200305021829.h42ITclA000178@81-2-122-30.bradfords.org.uk.suse.lists.linux.kernel>
[not found] ` <b8udjm$cgq$1@cesium.transmeta.com.suse.lists.linux.kernel>
2003-05-02 20:51 ` [Announcement] "Exec Shield", new Linux security feature Andi Kleen
2003-05-02 20:56 ` H. Peter Anvin
2003-05-02 21:07 ` Andi Kleen
2003-05-02 21:09 ` H. Peter Anvin
2003-05-02 21:25 ` Andi Kleen
2003-05-02 22:46 Chuck Ebbert
2003-05-03 13:19 linux
2003-05-03 23:00 ` Valdis.Kletnieks
2003-05-04 7:03 ` Calin A. Culianu
2003-05-04 8:49 ` Arjan van de Ven
2003-05-05 13:35 ` Jesse Pollard
2003-05-04 15:24 ` linux
2003-05-04 11:19 Yoav Weiss
2003-05-04 13:51 ` Ingo Molnar
2003-05-04 14:25 Chuck Ebbert
2003-05-04 22:22 ` Richard Henderson
2003-05-05 0:41 ` H. Peter Anvin
[not found] <Pine.LNX.4.44.0305040404300.12757-100000@devserv.devel.redhat.com.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.44.0305040448250.24497-100000@devserv.devel.redhat.com.suse.lists.linux.kernel>
2003-05-04 15:48 ` Andi Kleen
2003-05-04 16:20 Yoav Weiss
2003-05-04 23:55 Chuck Ebbert
2003-05-05 3:14 ` H. Peter Anvin
2003-05-05 7:14 Ingo Molnar
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