Re: Read only devices (Re: BoS: amodload.tar.gz - ...)

[petroca () acasun eckerd edu (Chris A. Petro)]

> This opens up new avenues of attack. (the server may now be
> suseptible to attacks from the inside. )
> A attacking system could answer NFS reads with its own
> data. Not a trivial attack, but I did read about it being done.  If the
> hardened server is serving as a firewall platform it may not be able
> to trust *either* side.

I have source for something similar that spoofs yp passwd (or any NIS map)
entries.  Nifty.  I'm sure it could be modified quite easily.  If anyone
is interested, I'll hunt it down and post it (this is bugtraq, after all).
I found it on the web somewhere, so it's not like it isn't already
available.

I haven't tried it, but the author seems quite knowledgable, so I imagine
that it works :^)

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