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Bug 2148737 - UPN check cannot be disabled explicitly but requires krb5_validate = false' as a work-around
Summary: UPN check cannot be disabled explicitly but requires krb5_validate = false' a...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: sssd
Version: 9.1
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: rc
: ---
Assignee: Sumit Bose
QA Contact: Jakub Vavra
URL:
Whiteboard: sync-to-jira
Depends On:
Blocks: 2148988
TreeView+ depends on / blocked
 
Reported: 2022-11-27 16:07 UTC by Alexey Tikhonov
Modified: 2023-05-09 10:28 UTC (History)
5 users (show)

Fixed In Version: sssd-2.8.2-1.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 2148988 (view as bug list)
Environment:
Last Closed: 2023-05-09 08:20:01 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github SSSD sssd issues 6451 0 None open UPN check cannot be disabled explicitly but requires krb5_validate = false' as a work-around 2022-11-27 16:13:49 UTC
Github SSSD sssd pull 6452 0 None open PAC: allow to disable UPN check and relax default check 2022-11-27 16:13:49 UTC
Red Hat Issue Tracker RHELPLAN-140553 0 None None None 2022-11-27 17:04:19 UTC
Red Hat Issue Tracker SSSD-5217 0 None None None 2022-11-27 17:04:23 UTC
Red Hat Product Errata RHBA-2023:2514 0 None None None 2023-05-09 08:20:06 UTC

Description Alexey Tikhonov 2022-11-27 16:07:26 UTC 
This bug was initially created as a copy of Bug #2144491

I am copying this bug because: to track fix for RHEL9



Description of problem:

UPN check cannot be disabled explicitly but requires krb5_validate = false' as a workaround

The first is
that the UPN check cannot be disabled explicitly but requires
'krb5_validate = false' as a work-around, this is already fixed
by the test build provided by Sumit 

Version-Release number of selected component (if applicable):

RHEL 8.7

sssd-2.7.3-4.el8_7.1.x86_64

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:

Failed login with AD user on IPA client

From sssd_pac.log

-----
   *  (2022-11-16  6:54:57): [pac] [cache_req_done] (0x0400): [CID#2] CR #0: Finished: Success
   *  (2022-11-16  6:54:57): [pac] [check_upn_and_sid_from_user_and_pac] (0x0020): [CID#2] UPN of user entry and PAC do not match.
********************** BACKTRACE DUMP ENDS HERE *********************************

(2022-11-16  6:55:08): [pac] [check_upn_and_sid_from_user_and_pac] (0x0020): [CID#4] UPN of user entry and PAC do not match.
   *  ... skipping repetitive backtrace ...
(2022-11-16  6:55:21): [pac] [check_upn_and_sid_from_user_and_pac] (0x0020): [CID#6] UPN of user entry and PAC do not match.
   *  ... skipping repetitive backtrace ...
(2022-11-16  6:55:31): [pac] [check_upn_and_sid_from_user_and_pac] (0x0020): [CID#8] UPN of user entry and PAC do not match.
   *  ... skipping repetitive backtrace ...
(2022-11-16  6:55:43): [pac] [check_upn_and_sid_from_user_and_pac] (0x0020): [CID#10] UPN of user entry and PAC do not match.
-----

Expected results:

With the test build.

------
(2022-11-17  4:03:50): [pac] [check_upn_and_sid_from_user_and_pac] (0x4000): [CID#2] UPN of user entry [abroy.COM] and PAC [Abhijit.Roy.com] do not match, ignored. <---
(2022-11-17  4:03:50): [pac] [sysdb_ldb_msg_difference] (0x2000): [CID#2] Added attr [pacBlob] to entry [name=aduser1.COM,cn=users,cn=AD.EXAMPLE.COM,cn=sysdb]
(2022-11-17  4:03:50): [pac] [sysdb_set_entry_attr] (0x0200): [CID#2] Entry [name=aduser1.COM,cn=users,cn=AD.EXAMPLE.COM,cn=sysdb] has set [cache, ts_cache] attrs.
------

Now, sssd is able to ignore the `UPN of user entry [abroy.COM] and PAC [Abhijit.Roy] do not match, ignored`


Additional info:
Comment 1 Alexey Tikhonov 2022-11-27 16:13:49 UTC 
Upstream PR: https://github.com/SSSD/sssd/pull/6452
Comment 5 Alexey Tikhonov 2022-11-30 16:05:06 UTC 
Pushed PR: https://github.com/SSSD/sssd/pull/6452

* `master`
    * 51b11db8b99a77ba5ccf6f850c2e81b5a6ee9f79 - pac: relax default check
    * b3d7a4f6d4e1d4fa1bd33b296cd4301973f1860c - ipa: do not add guessed principal to the cache
    * 91789449b7a8b20056e1edfedd8f8cf92f7a0a2a - PAC: allow to disable UPN check
* `sssd-2-8`
    * 35a28524e407bf4b05a17c7c7f0b48799a18e8bf - pac: relax default check
    * a3304cc6b27b2f0678d0dcb4130865aa09442f5d - ipa: do not add guessed principal to the cache
    * b00c72d29b172a91b3eac5bc7b8ed275b883ec61 - PAC: allow to disable UPN check
Comment 12 errata-xmlrpc 2023-05-09 08:20:01 UTC 
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 (sssd bug fix and enhancement update), 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/RHBA-2023:2514
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