Messages in this thread | | | Date | Wed, 01 Oct 2008 13:29:58 +0200 | From | Tilman Baumann <> | Subject | Re: SMACK netfilter smacklabel socket match |
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Casey Schaufler wrote: >> Casey Schaufler wrote: > If you really want to be abusive you could replace the smack_access() > function in security/smack/smack_access.c (of all places) with a no-op > returning 0 in all cases.
I thought of that too. :) But i would rather like to use the thing in it's intended function sometime in the future.
>> What I then to is write iptables OUTPUT chain matches which match for >> any of these labels and set some connection marks and firewall marks. >> Which I then can use in routing rules to give different routing rules >> to specific processes. (Like all proxy traffic over a second DSL line) >> >> I know, it's totally crazy. But it seems to work. :) >> I just hope the security part of this all will not break anything. But >> it does not look like it would right now. > > Smack will eventually bite you if you're not careful, but users of > MAC systems wouldn't be surprised by that. Speaking of the devil... This is exactly what happened to me right now. I have problems with _some_ https connects. The problem lies somewhere in openssl. I did not yet find any clue with strace. Is there some straight forward way to audit/debug LSM interventions?
I have probably missed something that a labeled process could not do as a '_' process could. Have no idea right now, but it is probably something stupidly simple.
> I don't think it's crazy, > I think it's a matter of using what's available in novel ways. I like that attitude. :)
-- Tilman Baumann Software Developer Collax GmbH . Boetzinger Strasse 60 . 79111 Freiburg . Germany
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