[Bug 2299722] New: SELinux preventing password authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

Bug ID: 2299722
           Summary: SELinux preventing password authentication
           Product: Fedora
           Version: rawhide
            Status: NEW
         Component: sssd
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail],
                    [e-mail]
  Target Milestone: ---
    Classification: Fedora

Description of problem:

We're seeing SELinux preventing password authentication:

In permissive mode it works and we see:

type=AVC msg=audit(1721842903.063:1198): avc:  denied  { read } for  pid=31553
comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
tcontext=system_u:system_r:cifs_helper_t:s0 tclass=key permissive=1
type=AVC msg=audit(1721842903.064:1199): avc:  denied  { view } for  pid=31553
comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
tcontext=system_u:system_r:cifs_helper_t:s0 tclass=key permissive=1
type=AVC msg=audit(1721842903.064:1200): avc:  denied  { write } for  pid=31553
comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
tcontext=system_u:system_r:cifs_helper_t:s0 tclass=key permissive=1
type=AVC msg=audit(1721842989.327:1210): avc:  denied  { read } for  pid=31647
comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
tcontext=system_u:system_r:cifs_helper_t:s0 tclass=key permissive=1
type=AVC msg=audit(1721843092.725:1229): avc:  denied  { read } for  pid=31751
comm="krb5_child" scontext=system_u:system_r:sssd_t:s0
tcontext=system_u:system_r:cifs_helper_t:s0 tclass=key permissive=1

krb5_child.log shows:

(2024-07-24  9:54:32): [krb5_child[30625]] [set_lifetime_options] (0x0100):
[RID#771] No specific renewable lifetime requested.
(2024-07-24  9:54:32): [krb5_child[30625]] [set_lifetime_options] (0x0100):
[RID#771] No specific lifetime requested.
(2024-07-24  9:54:32): [krb5_child[30625]] [set_canonicalize_option] (0x0100):
[RID#771] Canonicalization is set to [true]
(2024-07-24  9:54:34): [krb5_child[30625]] [create_ccache] (0x0020): [RID#771]
1548: [13][Permission denied]

Version-Release number of selected component (if applicable):
sssd-2.9.5-1.fc39.x86_64
selinux-policy-39.7-1.fc39.noarch

How reproducible:
Unsure

[Bug 2299722] SELinux preventing password authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

Orion Poplawski  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|sssd                        |selinux-policy
                 CC|                            |[e-mail],
                   |                            |[e-mail],
                   |                            |[e-mail],
                   |                            |[e-mail],
                   |                            |[e-mail],
                   |                            |[e-mail],
                   |                            |[e-mail]
           Doc Type|---                         |If docs needed, set a value
           Assignee|[e-mail] |[e-mail]
                   |raproject.org               |

[Bug 2299722] SELinux preventing password authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

Orion Poplawski  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|rawhide                     |39

[Bug 2299722] SELinux preventing password authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

--- Comment #1 from Orion Poplawski  ---
See also #1802062

[Bug 2299722] SELinux preventing password authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

--- Comment #2 from Sumit Bose  ---
Hi,

so it looks like the KEYRING type Kerberos credential cache is stored in the
kernel keyring with the SELinux label of the application which
created/modified/accessed(?) it the last time instead of the generic
system_u:system_r:kernel_t:s0 label which would allow access to SSSD and other
kerberized application trying to access the credential cache. Maybe it would
help to update the title of this ticket accordingly, if you prefer I can do it?

bye,
Sumit

[Bug 2299722] SELinux preventing password authentication

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

--- Comment #3 from Orion Poplawski  ---
Please update it as you see fit.

[Bug 2299722] Wrong SELinux label for Kerberos kernel keyring credential cache

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

Sumit Bose  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|SELinux preventing password |Wrong SELinux label for
                   |authentication              |Kerberos kernel keyring
                   |                            |credential cache
           Keywords|                            |Regression

[Bug 2299722] Wrong SELinux label for Kerberos kernel keyring credential cache

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

--- Comment #4 from Sumit Bose  ---
(In reply to Orion Poplawski from comment #3)
> Please update it as you see fit.

Hi,

thanks, I updated the title and added the Regression keyword, because I think
this is a regression.

bye,
Sumit

[Bug 2299722] Wrong SELinux label for Kerberos kernel keyring credential cache

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

--- Comment #5 from Aoife Moloney  ---
This message is a reminder that Fedora Linux 39 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 39 on
2024-11-26.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with
a
'version' of '39'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, change the 'version' 
to a later Fedora Linux version. Note that the version field may be hidden.
Click the "Show advanced fields" button if you do not see it.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora Linux 39 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora Linux, you are encouraged to change the 'version' to a later version
prior to this bug being closed.

[Bug 2299722] Wrong SELinux label for Kerberos kernel keyring credential cache

https://bugzilla.redhat.com/show_bug.cgi?id=2299722

Aoife Moloney  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |EOL
             Status|NEW                         |CLOSED
        Last Closed|                            |2024-12-02 13:12:49

--- Comment #6 from Aoife Moloney  ---
Fedora Linux 39 entered end-of-life (EOL) status on 2024-11-26.

Fedora Linux 39 is no longer maintained, which means that it
will not receive any further security or bug fix updates. As a result we
are closing this bug.

If you can reproduce this bug against a currently maintained version of Fedora
Linux
please feel free to reopen this bug against that version. Note that the version
field may be hidden. Click the "Show advanced fields" button if you do not see
the version field.

If you are unable to reopen this bug, please file a new report against an
active release.

Thank you for reporting this bug and we are sorry it could not be fixed.