Re: [Nagios-devel] [oss-security] Security bug or feature? Servicegroups leak hostnames to unauthorized users (Was: [oss-security] CVE request: unauthorized host/service views displayed in servicegroup view)

[Andreas Ericsson <ae () op5 se>]

On 2013-09-04 11:37, Jochen Bern wrote:
> On 04.09.2013 11:03, Andreas Ericsson wrote:
> > On 2013-09-04 10:31, Jonas Meurer wrote:
> > > The indisputable part of this change is, that users are allowed to see
> > > hostgroups and servicegroups with at least one authorized host or
> > > service. Unclear is, whether this means "group and all its group
> > > members", or "group and only authorized group members".
> >
> > It should mean "group and only authorized group members, except also
> > hosts for services where one is authorized to see the service".
> [...]
> > Well, it *was* by design, but now I'm changing the design. It's a good
> > time for it, since 4.0 is about to come out. I think the security teams
> > can move on and we'll consider this "changed" rather than "fixed" for
> > 4.0, where we do some security tightening.
>
> Since you do seem to be willing to ponder the system of access rights
> and its security implications: I haven't checked the 4.x prereleases
> yet, does being authorized to see a host's information still necessarily
> provide access to *all* services on it?

AFAIK, yes. Please understand that I'm very uninterested in changes to
the UI though, and I'd be much (much) happier if UI and core were
split into two different components.

> In the "customers accessing provider's Nagios" scenario, I suppose that
> the customer might be interested in seeing "application is running" but
> not, say, "the snmpd that ties this machine to the provider's NMS is
> acting up" ...

I agree. The problem is that with access to the host comes access to
commands that affect all services on that host as well, so it's not
necessarily as clearcut as "disable viewing here and we're done", if
one wants to do things properly.

--
Andreas Ericsson                   andreas.ericsson () op5 se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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