Kmem security (was: Re: How do you make your UNIX crash ???

Tim W Smith ts at cup.portal.com
Sat Mar 23 19:52:02 AEST 1991


A lot depends on how your terminal driver works.  For instance, there
was one version of Unix (32V, I believe), whose terminal driver used
a global buffer for canonicalization.  On this system, you would
just do something like

	yes "_canonb/S" | adb /unix /dev/kmem

and sit back and wait.

Sure, you got a lot of garbage.  But every so often, you would see
something like:
	
	_canonb: root

followed by

	_canonb: foobar

where foobar would be a pretty good thing to try for the root
password.  Sometimes it was wrong, but sometimes it was right,
and that's enough.

					Tim Smith



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