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Date:      Tue, 12 Sep 2000 08:09:56 +0200 (CEST)
From:      Paul Herman <pherman@frenchfries.net>
To:        freebsd-security@FreeBSD.ORG
Subject:   init securelevel 1 -> 0, dangerous?
Message-ID:  <Pine.BSF.4.21.0009120758260.320-100000@bagabeedaboo.security.at12.de>

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Hi,

Does anyone know of any dangers of letting init lower the securelevel
to zero for single user mode?

What I already know is that allowing gdb to attach (via ptrace(2)) to
init (to trick it into lowering securelevel) is forbiden in
kern/sys_process.c (or kern/kern_prot.c in -CURRENT)

I asked -hackers and -current a week ago, but got no concrete answers,
so I thought I'd ask one last time on -security.  There is an open PR
on this...

Ideas?

-Paul.



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