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SubjectRe: BTTV detection broken in 2.4.0-test11-pre5
On Mon, 20 Nov 2000, David Woodhouse wrote:
> On Sun, 19 Nov 2000, Dan Hollis wrote:
> > Writeprotect the flashbios with the motherboard jumper, and remove the
> > cmos battery.
> > Checkmate. :-)
> Only if you run your kernel XIP from the flash. If you load it into RAM,
> it's still possible for an attacker to modify it. You can load new code
> into the kernel even if the kernel doesn't make it easy for you by having
> CONFIG_MODULES defined.

The original assertion made was that a script kiddie could modify the
kernel so you wouldnt be able to detect a rooted box even after a reboot.

What I posted would stop that cold, 100%. Boot from writeprotected floppy,
writeprotect the flashbios, and remove the cmos battery.

-Dan

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