Vulnerability Development: Re: Kernel module for file protection ideas

[Michael Hendrickx <michael () scanit be>]

> Any thoughts/ideas?
It is easy to hide files, in all different directories.  For unix,
"/tmp/..." looks suspicious, but /usr/local/samba/var not (if you have
samba installed), furthermore it is hard to get *all* directories

Using "directory traversal" techniques it is possible to still create
hidden directories.

If your /tmp has a directory called "devel", it is possible to create
"/tmp/devel/../.X11-unix" (which won't be in the 'blacklist'), which
turns out to be "/tmp/.X11-unix" (which is blacklisted)

Also, imagine having a directory ".. ", or ". ".. which is possible.

Not even mentioning non printable characters..

> From a personal point of view, it is better to have a watchdog that
looks for all files created and sends his logs to an external machine..
But these modules exist already, although it is not a bad programming
exercise.

Just a thought,

Regards,
 Michael

-- 
Michael Hendrickx
Security Engineer
Scanit NV/SA
http://www.scanit.be

  "Rabbit Run!"
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