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Description of problem: User authentication fails when ldap_access_order is set to authorized_service Version-Release number of selected component (if applicable): sssd-2.0.0-38.el8.x86_64 How reproducible: Always Steps to Reproduce: 1.Add a LDAP testuser with objectclass authorizedServiceObject and attribute authorizedService: sshd # testuser1, People, example.com dn: uid=testuser1,ou=People,dc=example,dc=com objectClass: posixAccount objectClass: account objectClass: authorizedServiceObject objectClass: top authorizedService: sshd cn: testuser1 uid: testuser1 uidNumber: 10001 gidNumber: 10001 homeDirectory: /home/testuser1 loginShell: /bin/bash 2. Configure sssd.conf with ldap_access_order = authorized_service [sssd] config_file_version = 2 domains = LDAP services = nss, pam sbus_timeout = 30 [nss] filter_groups = root filter_users = root [pam] debug_level = 0xFFF0 [domain/LDAP] ldap_search_base = dc=example,dc=com debug_level = 9 id_provider = ldap ldap_uri = ldaps://host-8-243-42.host.centralci.eng.rdu2.redhat.com:636 ldap_tls_cacert = /etc/openldap/certs/cacert.pem access_provider = ldap ldap_access_order = authorized_service ldap_user_authorized_service = authorized_service 3. Clear the sssd cache. 4. Check the authetication of user, [root@host-8-246-254 ~]# ssh -l testuser1 localhost testuser1@localhost's password: Connection closed by ::1 port 22 Authentication failed. 5. From log, Jan 25 01:41:10 client-4704 sshd[21932]: pam_sss(sshd:auth): authentication success; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=testuser1 Jan 25 01:41:10 client-4704 sshd[21932]: pam_sss(sshd:account): system info: [Authorized service attribute missing, access denied] Jan 25 01:41:10 client-4704 sshd[21932]: pam_sss(sshd:account): Access denied for user testuser1: 6 (Permission denied) Jan 25 01:41:10 client-4704 sshd[21932]: Failed password for testuser1 from ::1 port 40688 ssh2 Jan 25 01:41:10 client-4704 sshd[21932]: fatal: Access denied for user testuser1 by PAM account configuration [preauth] From log also first getting authentication success and later getting access denied for user 5. After commenting 'ldap_access_order = authorized_service and ldap_user_authorized_service = authorized_service' and adding ldap_access_filter = (authorizedService=sshd) in sssd.conf, user authetication is successful. [sssd] config_file_version = 2 domains = LDAP services = nss, pam sbus_timeout = 30 [nss] filter_groups = root filter_users = root [pam] debug_level = 0xFFF0 [domain/LDAP] ldap_search_base = dc=example,dc=com debug_level = 9 id_provider = ldap ldap_uri = ldaps://host-8-243-42.host.centralci.eng.rdu2.redhat.com:636 ldap_tls_cacert = /etc/openldap/certs/cacert.pem access_provider = ldap #ldap_access_order = authorized_service #ldap_user_authorized_service = authorized_service ldap_access_filter = (authorizedService=sshd) [root@host-8-246-254 ~]# ssh -l testuser1 localhost testuser1@localhost's password: Activate the web console with: systemctl enable --now cockpit.socket Last failed login: Fri Jan 25 01:41:10 EST 2019 from ::1 on ssh:notty There were 3 failed login attempts since the last successful login. Last login: Fri Jan 25 01:07:37 2019 from ::1 Could not chdir to home directory /home/testuser1: No such file or directory id: cannot find name for group ID 10001 [testuser1@host-8-246-254 /]$ exit logout Connection to localhost closed. Actual results: Authentication failing with ldap_access_order and successful with ldap_access_filter. Expected results: Authentication should successful with ldap_access_order also.
(In reply to Madhuri from comment #0) ... > > 5. After commenting 'ldap_access_order = authorized_service and > ldap_user_authorized_service = authorized_service' and > adding ldap_access_filter = (authorizedService=sshd) in sssd.conf, user > authetication is successful. Since according to the working filter rule the LDAP attribute is called 'authorizedService' I'd like to suggest to try with ldap_access_order = authorized_service ldap_user_authorized_service = authorizedService HTH bye, Sumit
I tried with the above changes, still, authentications failing, for log, Jan 25 03:40:09 client-4704 sshd[22169]: pam_sss(sshd:auth): authentication success; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=testuser1 Jan 25 03:40:09 client-4704 sshd[22169]: Accepted password for testuser1 from ::1 port 40724 ssh2 Jan 25 03:40:09 client-4704 systemd[22172]: pam_sss(systemd-user:account): system info: [Authorized service attribute has no matching rule, access denied] Jan 25 03:40:09 client-4704 systemd[22172]: pam_sss(systemd-user:account): Access denied for user testuser1: 6 (Permission denied) Jan 25 03:40:09 client-4704 sshd[22169]: pam_systemd(sshd:session): Failed to create session: Start job for unit user@10001.service failed with 'failed' Jan 25 03:40:09 client-4704 sshd[22169]: pam_unix(sshd:session): session opened for user testuser1 by (uid=0) Jan 25 03:40:09 client-4704 sshd[22169]: error: PAM: pam_open_session(): System error Jan 25 03:40:09 client-4704 sshd[22177]: Received disconnect from ::1 port 40724:11: disconnected by user Jan 25 03:40:09 client-4704 sshd[22177]: Disconnected from user testuser1 ::1 port 40724
Hi, can you try to add another value 'systemd-user' to the authorizedService attribute. HTH bye, Sumit
Added new user, # testuser2, People, example.com dn: uid=testuser2,ou=People,dc=example,dc=com objectClass: posixAccount objectClass: account objectClass: authorizedServiceObject objectClass: top authorizedService: systemd-user cn: testuser2 uid: testuser2 uidNumber: 100012 gidNumber: 100012 homeDirectory: /home/testuser2 loginShell: /bin/bash Tried to authenticate with that user after clearing sssd cache, but authentication failed, from log, Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:auth): authentication success; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=testuser2 Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:account): system info: [Authorized service attribute has no matching rule, access denied] Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:account): Access denied for user testuser2: 6 (Permission denied) Jan 25 04:11:07 client-4704 sshd[22323]: Failed password for testuser2 from ::1 port 40752 ssh2 Jan 25 04:11:07 client-4704 sshd[22323]: fatal: Access denied for user testuser2 by PAM account configuration [preauth]
(In reply to Madhuri from comment #5) > Added new user, > # testuser2, People, example.com > dn: uid=testuser2,ou=People,dc=example,dc=com > objectClass: posixAccount > objectClass: account > objectClass: authorizedServiceObject > objectClass: top > authorizedService: systemd-user I meant to add another value not replace it, it should look like: authorizedService: systemd-user authorizedService: sshd HTH bye, Sumit > cn: testuser2 > uid: testuser2 > uidNumber: 100012 > gidNumber: 100012 > homeDirectory: /home/testuser2 > loginShell: /bin/bash > > Tried to authenticate with that user after clearing sssd cache, > but authentication failed, > > from log, > Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:auth): authentication > success; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=testuser2 > Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:account): system info: > [Authorized service attribute has no matching rule, access denied] > Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:account): Access > denied for user testuser2: 6 (Permission denied) > Jan 25 04:11:07 client-4704 sshd[22323]: Failed password for testuser2 from > ::1 port 40752 ssh2 > Jan 25 04:11:07 client-4704 sshd[22323]: fatal: Access denied for user > testuser2 by PAM account configuration [preauth]
I thought we've been over this on IRC. This is a sort of a systematic change in RHEL-8 as requested in https://bugzilla.redhat.com/show_bug.cgi?id=1643928. IPA added the systemd-user PAM service to the HBAC list by default in https://pagure.io/freeipa/issue/7831
(Sorry, I hit save changes too soon) I'm not sure we should do anything on the deamon side. Permitting the service or adding it to the filter unconditionally might work, but seems like a hack, because unlike with HBAC (or GPOs) we can't presume much about the structure of the server-side rules. At least for the time being, we could ask our docs writers to add a note about this for the RHEL-8 documentation and maybe add a note to the man page?
Also maybe some leapp content for the sake of the upgrades might be nice..
(In reply to Sumit Bose from comment #7) > (In reply to Madhuri from comment #5) > > Added new user, > > # testuser2, People, example.com > > dn: uid=testuser2,ou=People,dc=example,dc=com > > objectClass: posixAccount > > objectClass: account > > objectClass: authorizedServiceObject > > objectClass: top > > authorizedService: systemd-user > > I meant to add another value not replace it, it should look like: > > authorizedService: systemd-user > authorizedService: sshd > > HTH > > bye, > Sumit > > > cn: testuser2 > > uid: testuser2 > > uidNumber: 100012 > > gidNumber: 100012 > > homeDirectory: /home/testuser2 > > loginShell: /bin/bash > > > > Tried to authenticate with that user after clearing sssd cache, > > but authentication failed, > > > > from log, > > Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:auth): authentication > > success; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=testuser2 > > Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:account): system info: > > [Authorized service attribute has no matching rule, access denied] > > Jan 25 04:11:07 client-4704 sshd[22323]: pam_sss(sshd:account): Access > > denied for user testuser2: 6 (Permission denied) > > Jan 25 04:11:07 client-4704 sshd[22323]: Failed password for testuser2 from > > ::1 port 40752 ssh2 > > Jan 25 04:11:07 client-4704 sshd[22323]: fatal: Access denied for user > > testuser2 by PAM account configuration [preauth] With this change authentication is successful.
(In reply to Jakub Hrozek from comment #8) sorry for not reading carefully, After getting the successful run with beaker, will update the bug and close it.
(In reply to Madhuri from comment #12) > (In reply to Jakub Hrozek from comment #8) > > sorry for not reading carefully, > After getting the successful run with beaker, > will update the bug and close it. Thank you for the test run, do you think it would made sense to open a documentation request and/or a ticket about amending the man page?
(In reply to Jakub Hrozek from comment #13) > (In reply to Madhuri from comment #12) > > (In reply to Jakub Hrozek from comment #8) > > > > sorry for not reading carefully, > > After getting the successful run with beaker, > > will update the bug and close it. > > Thank you for the test run, do you think it would made sense to open a > documentation request and/or a ticket about amending the man page? Yes.. it makes perfect sense.
Upstream ticket: https://pagure.io/SSSD/sssd/issue/3932
master: 820151f3813f08c704cb87a99988fe39f9f48a8d
Verified with [root@ci-vm-10-0-146-233 ~]# rpm -qa sssd sssd-2.2.0-16.el8.x86_64 From man page of sssd-ldap ldap_user_authorized_service (string) If access_provider=ldap and ldap_access_order=authorized_service, SSSD will use the presence of the authorizedService attribute in the user's LDAP entry to determine access privilege. An explicit deny (!svc) is resolved first. Second, SSSD searches for explicit allow (svc) and finally for allow_all (*). Please note that the ldap_access_order configuration option must include “authorized_service” in order for the ldap_user_authorized_service option to work. Some distributions (such as Fedora-29+ or RHEL-8) always include the “systemd-user” PAM service as part of the login process. Therefore when using service-based access control, the “systemd-user” service might need to be added to the list of allowed services. Default: authorizedService from above, marking this bug as Verified.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2019:3651