Re: runlevel, immutable, freebsd vs. /dev/mem

[Sameer Anja <sameer @ securities . com>]

If root can't access /dev/mem, can't he change the "secure level" and do
it??
And if not, who can change the "secure level" if needed????
	-sam

Peter da Silva wrote:
> 
> > Question: if hacker attains root, couldn't he just use /dev/mem, /dev/kmem,
> > /proc/### interfaces to change the runlevel variable in kernel, and then
> > turn off immutable or whatever else he wants?
> 
> At "most secure" level even root can't access /dev/mem and so on.