Re: SELinux last straw

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On 10/17/07, Les Mikesell <lesmikesell@xxxxxxxxx> wrote:
> Arthur Pemberton wrote:
>
> >> If I asked how to determine whether or not some particular access would
> >> be permitted or denied by the traditional unix mechanism you wouldn't
> >> have any trouble describing how to verify it in terms of permissions
> >> down the file path.  I'm asking the same question about SELinux.
> >
> > 1) familiarize ones self with the rules , as one has to do with
> > traditional secuirty
>
> But the traditional unix rules are extremely simple, and being able to
> understand and verify them is one of their biggest virtues.
>
> > 2) or just try it and see if it is allowed or not
>
> When something applies only to a particular process, how can you try it
> without running that process - which may have destructive side effects
> if it fails?
>
> >> How, for example, would you determine if some change will make it
> >> necessary to relabel?   How, other than running something and letting it
> >> fail to get the log message, do you positively determine that some
> >> specific access will be permitted or denied?
> >
> > perms can be viewed with `ls` and there is some command that provides
> > the current settings.
> >
> > How would you do it with traditional tools?
> >
> The shortcut test is to su to the user in question and try to access the
> file/device.  The only slightly more complicated way is to walk down the
> path looking at the permissions for user/group/other on the file and the
> directories above.

Well, these "traditional" methods didn't work for your friend Karl,
since he was hacked with them.

-- 
Fedora 7 : sipping some of that moonshine
( www.pembo13.com )

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