Re: [Freeipa-devel] New ACIs for cn=etc

Petr Viktorin Wed, 16 Apr 2014 03:52:24 -0700

On 04/14/2014 04:00 PM, Simo Sorce wrote:

On Mon, 2014-04-14 at 12:55 +0200, Martin Kosek wrote:

When heading for a lunch today, I had a discussion with Petr3 about ACIs for
cn=etc,SUFFIX. On our initial meeting back at DevConf.cz time, we said we will
simply allow all attributes in cn=etc for authenticated users and will just
exclude the blacklisted attributes (for context, see ticket #3566).


I personally think it is not the best thing to do as it will just move the
problem we had with all-allowing ACI one level down from SUFFIX to cn=etc. It
would be better to add normal ACIs for cn=etc as well.

I searched for nsContainer's in cn=etc and IMO the situation is not so bad, it
seems straightforward what ACIs would be needed:

==========================================================================
dn: cn=etc,SUFFIX
- ADD aci allowing reading nsContainer for anonymous, EXCEPT:

We can combine this with the general nsContainer read ACI. The problemis that we can only have one target-based exclusion rule.

   - cn=virtual operations,cn=etc,SUFFIX


Could we use a special objectClass rather than nsContainer for these?

   - cn=masters,cn=ipa,cn=etc,SUFFIX


This is the one I'd exclude with the target rule.

   - cn=Managed Entries,cn=etc,SUFFIX


Why exclude this one? Aren't the containers the same in all IPA installs?

dn: cn=sysaccounts,cn=etc,SUFFIX
- ADD aci allowing reading all attributes but password attributes (people may
add unstructured accounts following different objectclasses)

I'd rather list the attributes and let people add custom attributesthemselves.

dn: cn=ipa,cn=etc,SUFFIX
- no ACI needed

dn: cn=masters,cn=ipa,cn=etc,SUFFIX
- ADD aci allowing reading hosts (to have it separate from global cn=etc one so
that we can once assign it only to ipamasters hostgroup for example)

dn: cn=replicas,cn=ipa,cn=etc,SUFFIX
- ADD aci allowing reading replicas for authenticated users (masters)

dn: cn=dna,cn=ipa,cn=etc,SUFFIX
- ADD aci allowing reading dnaSharedConfig objects for authenticated

dn: cn=posix-ids,cn=dna,cn=ipa,cn=etc,SUFFIX
- no ACI needed

dn: cn=ca_renewal,cn=ipa,cn=etc,SUFFIX
- ADD aci allowing reading for authenticated users (hosts' certmonger)

dn: cn=s4u2proxy,cn=etc,SUFFIX
- no ACI needed at this point, KDC access it with DM privileges AFAIK

dn: cn=ipaConfig,cn=etc,SUFFIX
- ADD aci allowing reading ipaConfigObject attributes for authenticated users.
We already plan aci allowing writing them

dn: cn=ranges,cn=etc,SUFFIX
- ADD aci allowing reading ipaIDrange for authenticated users

dn: cn=virtual operations,cn=etc,SUFFIX
- ADD aci allowing reading/updating virtual operations, assign to RBAC 
privileges

dn: cn=retrieve certificate,cn=virtual operations,cn=etc,SUFFIX
dn: cn=request certificate,cn=virtual operations,cn=etc,SUFFIX
dn: cn=request certificate different host,cn=virtual operations,SUFFIX
dn: cn=certificate status,cn=virtual operations,cn=etc,SUFFIX
dn: cn=revoke certificate,cn=virtual operations,cn=etc,SUFFIX
dn: cn=certificate remove hold,cn=virtual operations,cn=etc,SUFFIX
- no ACI needed

dn: cn=Managed Entries,cn=etc,SUFFIX
- no ACI needed, not managed by IPA users

dn: cn=automember,cn=etc,SUFFIX
- ADD standard automembers ACIs (read, write, delete, ...)

dn: cn=CAcert,cn=ipa,cn=etc,SUFFIX
- ADD aci allowing reading cACertificate for anonymous

dn: cn=anonymous-limits,cn=etc,SUFFIX
- no ACI needed, not managed by IPA users

dn: cn=replication,cn=etc,SUFFIX
- ADD aci allowing reading for authenticated users (used in ipa-replica-install)

dn: cn=Realm Domains,cn=ipa,cn=etc,SUFFIX
- no ACI needed, we already added read aci

dn: cn=ad,cn=etc,SUFFIX
- ADD aci allowing reading ipaNTDomainAttrs for authenticated users (trust
settings)

==========================================================================

That should be pretty much all. I know that devil hides in details, but I did
not see any blocker to skip the chance to add proper ACIs also for cn=etc as
well and thus remove the all allowing ACI at all (I am afraid that we would be
stuck with cn=etc all-allowing ACI for years otherwise).

Comments welcome.


Agree with the general plan, let's start with this and add permissions
as needed.

Simo.



--
Petr³

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