From: kuznet@ms2.inr.ac.ru
To: alan@lxorguk.UKuu.ORG.UK (Alan Cox)
Cc: linux-kernel@vger.kernel.org
Subject: Re: Local root exploit with kmod and modutils > 2.1.121
Date: Thu, 16 Nov 2000 20:05:05 +0300 (MSK) [thread overview]
Message-ID: <200011161705.UAA03238@ms2.inr.ac.ru> (raw)
In-Reply-To: <E13wRWU-0007yG-00@the-village.bc.nu> from "Alan Cox" at Nov 16, 0 07:15:02 pm
Hello!
> > request_module has the same effect as running suid. dev_load() can
> > take the interface name and pass it to modprobe unchanged and modprobe
> > does not verify its input, it trusts root/kernel.
>
> Then dev_load is being called the wrong way. In older kernels we explicitly
> only did a dev_load with user passed names providing suser() was true.
It checks CAP_SYS_MODULE nowadays.
Which does not look good by the way, it is function of request_module(),
rather than of caller.
Alexey
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next prev parent reply other threads:[~2000-11-16 17:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.21.0011131915240.19775-100000@ferret.lmh.ox.ac.uk>
2000-11-13 23:11 ` Keith Owens
2000-11-16 16:04 ` Alan Cox
2000-11-16 17:05 ` kuznet [this message]
2000-11-16 17:19 ` Alan Cox
2000-11-16 17:32 ` kuznet
2000-11-16 18:24 ` Alan Cox
2000-11-16 18:56 ` kuznet
2000-11-16 19:08 ` [PATCH] " Xavier Bestel
2000-11-16 20:24 ` Keith Owens
2000-11-16 21:45 ` Alan Cox
2000-11-14 20:31 Adam J. Richter
2000-11-14 22:50 ` Keith Owens
-- strict thread matches above, loose matches on Subject: below --
2000-11-13 10:57 Keith Owens
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