From: Ingo Molnar <mingo@elte.hu>
To: Willy Tarreau <w@1wt.eu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
pageexec@freemail.hu, Andi Kleen <andi@firstfloor.org>,
Arjan van de Ven <arjan@infradead.org>,
linux-kernel@vger.kernel.org, tglx@tglx.de, hpa@zytor.com
Subject: Re: [patch] Add basic sanity checks to the syscall execution patch
Date: Sat, 6 Sep 2008 17:45:51 +0200 [thread overview]
Message-ID: <20080906154551.GB1774@elte.hu> (raw)
In-Reply-To: <20080905204134.GI19337@1wt.eu>
* Willy Tarreau <w@1wt.eu> wrote:
> Then they will simply proceed like this :
> - patch /boot/vmlinuz
> - sync
> - crash system
>
> => user says "oh crap" and presses the reset button. Patched kernel boots.
> Game over. Patching vmlinuz for known targetted distros is even easier
> because the attacker just has to embed binary changes for the most
> common distro kernels.
a reboot often raises attention. But yes, in terms of end user boxes,
probably not. Anyway, my points were about transparent rootkits
installed on a running system without anyone noticing - obviously if the
attacker can modify the kernel image and the user does not mind a reboot
it's game over.
Ingo
next prev parent reply other threads:[~2008-09-06 15:46 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-04 2:51 Arjan van de Ven
2008-09-04 12:01 ` Andi Kleen
2008-09-04 12:34 ` Alan Cox
2008-09-04 13:06 ` Andi Kleen
2008-09-04 12:44 ` Arjan van de Ven
2008-09-05 9:43 ` pageexec
2008-09-05 10:14 ` Benjamin Herrenschmidt
2008-09-05 10:49 ` pageexec
2008-09-05 10:57 ` Benjamin Herrenschmidt
2008-09-05 11:42 ` Ingo Molnar
2008-09-05 12:00 ` pageexec
2008-09-05 15:42 ` Ingo Molnar
2008-09-05 16:23 ` pageexec
2008-09-05 16:52 ` Ingo Molnar
2008-09-05 17:26 ` Andi Kleen
2008-09-05 19:42 ` pageexec
2008-09-05 20:48 ` Andi Kleen
2008-09-05 19:37 ` pageexec
2008-09-06 15:42 ` Ingo Molnar
2008-09-07 0:17 ` pageexec
2008-09-05 12:01 ` Andi Kleen
2008-09-05 20:41 ` Willy Tarreau
2008-09-06 15:45 ` Ingo Molnar [this message]
2008-09-06 16:34 ` Jeroen van Rijn
2008-09-07 12:53 ` Pavel Machek
2008-09-05 16:05 ` Arjan van de Ven
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