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a5d38ca171
Since commit 5c0e7a5fb4, a new extended
operation to get a keytab is supposed to be used. This keytab
setting/retrieval extended operation checks access rights of the bound
DN to write to a virtual attribute 'ipaProtectedOperation;write_keys'.
If the write isn't allowed, the operation is rejected and ipa-getkeytab
tool falls back to an older code that generates the keytab on the client
and forcibly sets to the LDAP entry. For the latter, a check is done to
make sure the bound DN is allowed to write to 'krbPrincipalKey' attribute.
This fallback should never happen for newer deployments. When enrollemnt
operation is delegated to non-administrative user with the help of 'Host
Enrollment' role, a host can be pre-created or created at enrollment
time, if this non-administrative user has 'Host Administrators' role. In
the latter case a system permission 'System: Manage Host Keytab' grants
write access to 'krbPrincipalKey' attribute but lacks any access to the
virtual attributes expected by the new extended operation.
There is a second virtual attribute, 'ipaProtectedOperation;read_keys',
that allows to retrieve existing keys for a host. However, during
initial enrollment we do not allow to retrieve and reuse existing
Kerberos key: while 'ipa-getkeytab -r' would give ability to retrieve
the existing key, 'ipa-join' has no way to trigger that operation.
Hence, permission 'System: Manage Host Keytab' will not grant the right
to read the Kerberos key via extended operation used by 'ipa-getkeytab
-r'. Such operation can be done later by utilizing 'ipa
service/host-allow-retrieve-keytab' commands.
Fix 'System: Manage Host Keytab' permission and extend a permission test
to see that we do not fallback to the old extended operation.
Fixes: https://pagure.io/freeipa/issue/9496
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
FreeIPA Server
FreeIPA allows Linux administrators to centrally manage identity, authentication and access control aspects of Linux and UNIX systems by providing simple to install and use command line and web based management tools.
FreeIPA is built on top of well known Open Source components and standard protocols with a very strong focus on ease of management and automation of installation and configuration tasks.
FreeIPA can seamlessly integrate into an Active Directory environment via cross-realm Kerberos trust or user synchronization.
Benefits
FreeIPA:
- Allows all your users to access all the machines with the same credentials and security settings
- Allows users to access personal files transparently from any machine in an authenticated and secure way
- Uses an advanced grouping mechanism to restrict network access to services and files only to specific users
- Allows central management of security mechanisms like passwords, SSH Public Keys, SUDO rules, Keytabs, Access Control Rules
- Enables delegation of selected administrative tasks to other power users
- Integrates into Active Directory environments
Components
The FreeIPA project provides unified installation and management tools for the following components:
- LDAP Server - based on the 389 project
- KDC - based on MIT Kerberos implementation
- PKI based on Dogtag project
- Samba libraries for Active Directory integration
- DNS Server based on BIND and the Bind-DynDB-LDAP plugin
Project Website
Releases, announcements and other information can be found on the IPA server project page at http://www.freeipa.org/ .
Documentation
The most up-to-date documentation can be found at http://freeipa.org/page/Documentation .
Quick Start
To get started quickly, start here: http://www.freeipa.org/page/Quick_Start_Guide
For developers
- Building FreeIPA from source
- http://www.freeipa.org/page/Build
- See the BUILD.txt file in the source root directory
Licensing
Please see the file called COPYING.
Contacts
- If you want to be informed about new code releases, bug fixes, security fixes, general news and information about the IPA server subscribe to the freeipa-announce mailing list at https://www.redhat.com/mailman/listinfo/freeipa-interest/ .
- If you have a bug report please submit it at: https://pagure.io/freeipa/issues
- If you want to participate in actively developing IPA please subscribe to the freeipa-devel mailing list at https://lists.fedoraproject.org/archives/list/freeipa-devel@lists.fedorahosted.org/ or join us in IRC at irc://irc.libera.chat/freeipa