IRIX 3.2: new directory blocks not zeroed?
John H Merritt
merritt at iris613.gsfc.nasa.gov
Fri Feb 16 15:31:41 AEST 1990
In article <90Feb15.191156est.6155 at neat.cs.toronto.edu> ken at cs.toronto.edu (Ken Lalonde) writes:
>
> % cd /tmp
> % cp /etc/passwd . # any large text file will do
> % rm passwd
> % mkdir foo
> % cat -v foo
>
>Bad news if you care about filesystem security.
Poor example, but the point is illustrated. I could not read
the Ex.... files that 'vi' uses with the above technique. What I could
do was read part of someone elses (mode 600) file that was placed there
and removed. So we need a deamon that sits in /tmp waiting for files
to be deleted :-), How do we monitor /tmp files? No! No! No! don't
answer this; this discussion showed up in comp.unix.wizards.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
John H. Merritt # Yesterday I knew nothing,
Applied Research Corporation # Today I know that.
merritt at iris613.gsfc.nasa.gov #
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