Bugtraq mailing list archives

Re: obsd boot hack (boot-modified-kernel-attack)


From: deraadt () CVS OPENBSD ORG (Theo de Raadt)
Date: Tue, 14 Apr 1998 17:39:10 -0600


You don't even need such a complicated kernel modification program to
do this:

boot -d

Voila, you are in the kernel debugger.



Or, alternatively, make your own root filesystem and do:

boot -a
[...]
root device? fd0a


       and create the file /etc/boot.conf and add a line

           boot bsd

       This will cause the system to automaticly boot and load
       the /bsd kernel with out issueing the user the option to
       load a alternitive kernel.

That's the suggested way of handling secure machines.  I'm not sure if
we want to put a password system in there, it isn't clear if it will
help.  We'll think about it.



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