Re: snooper watchers

Dr. Frederick B. Cohen (fc@all.net)
Sun, 26 Feb 1995 00:13:01 -0500 (EST)

> 
> > If I turn the paranoid mode up a notch or two here..
> > What is to stop someone from mounting another filesystem over the top of
> > your tripwire database and crontab entries.  Replace the mount and df
> > commands to not show the new mount point.  Now you continue to believe
> > that you are a happy camper, all safe and secure.

...
> 
> Btw an easier attack is to just modify the script that regularly runs
> tripwire, usually run from cron.
...
> 
>                                      Tim N.
> 

	This whole set of issues has been researched in some depth and
partially solved - partially proven unsolvable.  See "Defense in Depth
Against Computer Viruses" and "Program Evolution for Operating System
Security" - both in the IFIP-TC11 Journal Computers and Security -
I won't bother to tell you who the author was - FC