Thank you for thinking about this. This is how it works

1. OK, I've parsed. Now, get my tree.
2. When called, give out my tree MD5, say I keep running as a server process
3. Something else has all the MD5s and "pings" me pretty regularly

Since the inherited PMs, get-my-tree etc are all in the tree, (excepting ///o and others as other submitters have suggested) our MD5 seems to "lock" up everything that matters.

With regards to changing the code on disk, I assume something conventional watches the .pl file and that other security is in place for other compromises. This would help us trust the PERL binary etc.

We then want to prevent foo-root-user being able to fiddle with the executable image in memory. At the PERL level at least.

So, you are right; something has to watch something - it's not "self-auditing" :-).

But is it the case that something could be injected into the memory image which issues fake MD5s for us? How hard is it to fiddle with execution tree in the Perl state machine?

I'll also follow up what other people have posted, thank you.

In reply to Re: Re: Locking PERL code another way by Anonymous Monk
in thread Locking PERL code another way by Anonymous Monk

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