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Bug 1915564 - sssd does not enforce smartcard auth for kde screen locker
Summary: sssd does not enforce smartcard auth for kde screen locker
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: sssd
Version: 9.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Sumit Bose
QA Contact: Scott Poore
URL:
Whiteboard: sync-to-jira
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-01-12 22:28 UTC by Orion Poplawski
Modified: 2022-11-15 13:07 UTC (History)
12 users (show)

Fixed In Version: sssd-2.7.0-1.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-11-15 11:17:20 UTC
Type: Bug
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
test build (11.64 MB, application/gzip)
2021-04-14 16:53 UTC, Sumit Bose
no flags Details


Links
System ID Private Priority Status Summary Last Updated
Github SSSD sssd issues 6023 0 None open sssd does not enforce smartcard auth for kde screen locker 2022-03-01 12:36:14 UTC
Red Hat Issue Tracker SSSD-3372 0 None None None 2021-12-08 12:29:35 UTC
Red Hat Product Errata RHBA-2022:8325 0 None None None 2022-11-15 11:17:49 UTC

Description Orion Poplawski 2021-01-12 22:28:43 UTC
Description of problem:

I'm attempting to require the use of smartcards everywhere.  authselect profile:

Profile ID: sssd
Enabled features:
- with-smartcard
- with-smartcard-required
- with-smartcard-lock-on-removal
- with-sudo
- with-custom-automount
- with-mkhomedir
- with-faillock

I had to modify /etc/pam.d/system-auth to add "kde" (use by plasma screen locker) to the list of services below:

auth        required                                     pam_env.so
auth        required                                     pam_faildelay.so delay=2000000
auth        required                                     pam_faillock.so preauth silent
auth        [success=1 default=ignore]                   pam_succeed_if.so service notin login:gdm:xdm:kdm:xscreensaver:gnome-screensaver:kde:kscreensaver quiet use_uid
auth        [success=done ignore=ignore default=die]     pam_sss.so require_cert_auth ignore_authinfo_unavail
auth        [default=1 ignore=ignore success=ok]         pam_usertype.so isregular
auth        [default=2 ignore=ignore success=ok]         pam_localuser.so
auth        [success=done authinfo_unavail=ignore ignore=ignore default=die] pam_sss.so try_cert_auth
auth        sufficient                                   pam_unix.so nullok try_first_pass
auth        [default=1 ignore=ignore success=ok]         pam_usertype.so isregular
auth        sufficient                                   pam_sss.so forward_pass
auth        required                                     pam_faillock.so authfail
auth        required                                     pam_deny.so

When I lock the screen and unlock with my password, the message:

Please insert smart card labeled Orion Poplawski

is displayed, but then the screen unlocks.  pam log messgges:

kcheckpass[7557]: pam_sss(kde:auth): User info message: Please insert smart card labeled
                                                    Orion Poplawski
kcheckpass[7557]: pam_sss(kde:auth): authentication success; logname=orion uid=22603 euid=22603 tty=:0 ruser= rhost= user=orion

sssd.conf has:

[pam]
pam_cert_auth = True
# kscreensaver for EL7, kde for Fedora
pam_p11_allowed_services = +kscreensaver, +kde


Version-Release number of selected component (if applicable):
sssd-2.3.0-9.el8.x86_64


FWIW - authselect issue - https://github.com/authselect/authselect/issues/234

Comment 1 Sumit Bose 2021-01-13 07:03:06 UTC
Hi,

I'd like to try an reproduce the issue locally, which KDE packages are you using or do you build them on your own?

bye,
Sumit

Comment 2 Orion Poplawski 2021-01-13 18:16:16 UTC
Thanks, I'm using the packages from Fedora EPEL.

Comment 3 Orion Poplawski 2021-02-25 21:07:39 UTC
Any progress here or anything else I can provide to help?  Thanks.

Comment 4 Sumit Bose 2021-04-14 16:53:37 UTC
Created attachment 1771951 [details]
test build

Hi,

thank you for you patience, please find attached a tar ball with a SSSD test build which should reject the login with the user password if you require Smartcard authentication.

In my test kscreenlocker displays the message asking to insert the proper Smartcard only for a very short time. I haven't found an option to make kscreenlocker to display it longer.

bye,
Sumit

Comment 5 Orion Poplawski 2021-04-16 16:07:00 UTC
That indeed appears to work, thanks!  I'll take up the issue the message display with the KDE folks.

Comment 6 Orion Poplawski 2021-05-13 16:30:08 UTC
Any chance this might make it into Stream soon?

Comment 7 Alexey Tikhonov 2022-03-01 13:58:22 UTC
Upstream PR: https://github.com/SSSD/sssd/pull/6024

Comment 10 Alexey Tikhonov 2022-04-14 10:20:43 UTC
Pushed PR: https://github.com/SSSD/sssd/pull/6024

* `master`
    * 4d2277f8c3065771a8c3bbc7938309a4905640f0 - pam: better SC fallback message
    * 731b3e668c6a659922466aee7fa8093412707325 - pam: add more checks for require_cert_auth

Comment 20 errata-xmlrpc 2022-11-15 11:17:20 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-2022:8325


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