On 11/16/2016 02:33 PM, Petr Spacek wrote:
On 16.11.2016 14:01, Stijn De Weirdt wrote:
hi all,

we are looking how to configure whatever relevant policy to minimise the
impact of compromised IPA hosts (ie servers with a valid host keytab).

in particular, it looks like it possible to retrieve any user token once
you have access to a valid host keytab.

we're aware that the default IPA policies are wide open, but we are
looking how to limit this. for us, there's no need that a hostkeytab can
retrieve tokens for anything except the services on that host.

What "token" do you have in mind?

We discussed this in another thread.

In the case that the host is compromised/stolen/hijacked, you can host-disable it to invalidate the keytab stored there but this does not prevent anyone logged on that host to bruteforce/DOS user accounts by trying to guess their Kerberos keys by repeated kinit.

Martin^3 Babinsky

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