Messages in this thread | | | Date | Tue, 20 Apr 1999 21:36:51 +0200 | From | Pavel Machek <> | Subject | Re: capabilities in elf headers, (my) final (and shortest) iteration |
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Hi!
> > > No it is not. You can still make interpretter suid root, and > > > interpretter will have to look if script is marked, and in such case > > > interpretter will have to interpret 'capability headers' in the > > > script. (You can use your #! idea if you want.) But suid interpretter > > > will be the one who parses capabilities. > > > Yes, you are correct; the interpreter should just get a (mostly) full cap > > set and parse the caps itself. Mine was a hairbrained idea, but at least > > it generated a better one. ;-) > > It _is_ harebrained: You want to make the system secure by auditing each > capable piece of software (at least those with dangerous capabilities, > however defined), and for stuff like the Perl interpreter this is hopeless, > or at least makes the whole exercise pointless.
Not true, you only need to audit small loader part.
> And again, what is going to stop me from faking capabilities in the script > when I write it?
s-bit being dropped as soon as you write to executable. (Or I do not understand what you mean by faking capabilities.) [We already have suid perl programs - is something wrong with them?]
Pavel
-- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).
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