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Bug 1781806 - SELinux prevents NetworkManager from getting status of winbind service
Summary: SELinux prevents NetworkManager from getting status of winbind service
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.2
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: 8.4
Assignee: Patrik Koncity
QA Contact: Milos Malik
URL:
Whiteboard:
: 1817989 1874929 1879619 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-12-10 15:53 UTC by Milos Malik
Modified: 2021-05-18 14:58 UTC (History)
11 users (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-05-18 14:57:35 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Milos Malik 2019-12-10 15:53:32 UTC 
Description of problem:

Version-Release number of selected component (if applicable):
NetworkManager-1.22.0-0.2.el8.x86_64
NetworkManager-adsl-1.22.0-0.2.el8.x86_64
NetworkManager-config-server-1.22.0-0.2.el8.noarch
NetworkManager-libnm-1.22.0-0.2.el8.x86_64
NetworkManager-team-1.22.0-0.2.el8.x86_64
NetworkManager-tui-1.22.0-0.2.el8.x86_64
NetworkManager-wifi-1.22.0-0.2.el8.x86_64
samba-4.11.2-4.el8.x86_64
samba-client-4.11.2-4.el8.x86_64
samba-client-libs-4.11.2-4.el8.x86_64
samba-common-4.11.2-4.el8.noarch
samba-common-libs-4.11.2-4.el8.x86_64
samba-common-tools-4.11.2-4.el8.x86_64
samba-libs-4.11.2-4.el8.x86_64
samba-winbind-4.11.2-4.el8.x86_64
samba-winbind-clients-4.11.2-4.el8.x86_64
samba-winbind-modules-4.11.2-4.el8.x86_64
selinux-policy-3.14.3-29.el8.noarch
selinux-policy-devel-3.14.3-29.el8.noarch
selinux-policy-doc-3.14.3-29.el8.noarch
selinux-policy-minimum-3.14.3-29.el8.noarch
selinux-policy-mls-3.14.3-29.el8.noarch
selinux-policy-sandbox-3.14.3-29.el8.noarch
selinux-policy-targeted-3.14.3-29.el8.noarch

How reproducible:
 * multiple USER_AVCs after each reboot

Actual results:
----
type=USER_AVC msg=audit(12/10/2019 16:44:20.803:166) : pid=1 uid=root auid=unset ses=unset subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=unset uid=root gid=root path=/usr/lib/systemd/system/winbind.service cmdline="" scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:object_r:samba_unit_file_t:s0 tclass=service permissive=0  exe=/usr/lib/systemd/systemd sauid=root hostname=? addr=? terminal=?' 
----

Expected results:
 * no SELinux denials
Comment 1 Milos Malik 2019-12-10 16:00:34 UTC 
Reproducible in 1minutetip:
 # yum -y install NetworkManager\* samba\*
 # reboot
 # ausearch -m avc -m user_avc -i
Comment 4 Milos Malik 2019-12-12 19:07:28 UTC 
The only SELinux denial that appears in permissive mode is:
----
type=USER_AVC msg=audit(12/12/2019 14:06:20.850:349) : pid=1 uid=root auid=unset ses=unset subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=unset uid=root gid=root path=/usr/lib/systemd/system/winbind.service cmdline="" scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:object_r:samba_unit_file_t:s0 tclass=service permissive=1  exe=/usr/lib/systemd/systemd sauid=root hostname=? addr=? terminal=?' 
----
Comment 5 Sergey Orlov 2020-01-06 14:36:54 UTC 
Same denial occurs when changing host name:
# yum install samba-winbind
# systemctl start winbind
# hostnamectl set-hostname hello
# ausearch -m USER_AVC
----
time->Mon Jan  6 09:26:15 2020
type=USER_AVC msg=audit(1578320775.851:299): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=n/a uid=0 gid=0 path="/usr/lib/systemd/system/winbind.service" cmdline="" scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:object_r:samba_unit_file_t:s0 tclass=service permissive=0  exe="/usr/lib/systemd/systemd" sauid=0 hostname=? addr=? terminal=?'
----
time->Mon Jan  6 09:26:15 2020
type=USER_AVC msg=audit(1578320775.867:300): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=n/a uid=0 gid=0 path="/usr/lib/systemd/system/winbind.service" cmdline="" scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:object_r:samba_unit_file_t:s0 tclass=service permissive=0  exe="/usr/lib/systemd/systemd" sauid=0 hostname=? addr=? terminal=?'


Also I see "access denied in journalctl":
Jan 06 09:26:15 ci-vm-10-0-137-193.hosted.upshift.rdu2.redhat.com dbus-daemon[671]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.30' (uid=0 pid=5
371 comm="hostnamectl set-hostname hello " label="unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023")
Jan 06 09:26:15 ci-vm-10-0-137-193.hosted.upshift.rdu2.redhat.com systemd[1]: Starting Hostname Service...
Jan 06 09:26:15 ci-vm-10-0-137-193.hosted.upshift.rdu2.redhat.com dbus-daemon[671]: [system] Successfully activated service 'org.freedesktop.hostname1'
Jan 06 09:26:15 ci-vm-10-0-137-193.hosted.upshift.rdu2.redhat.com systemd[1]: Started Hostname Service.
Jan 06 09:26:15 hello systemd-hostnamed[5372]: Changed static host name to 'hello'
Jan 06 09:26:15 hello NetworkManager[746]: <info>  [1578320775.8128] hostname: hostname changed from "ci-vm-10-0-137-193.hosted.upshift.rdu2.redhat.com" to "hello"
Jan 06 09:26:15 hello dbus-daemon[671]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.8' (uid=0 pid=746 comm="/usr/sbin/NetworkManager --n
o-daemon " label="system_u:system_r:NetworkManager_t:s0")
Jan 06 09:26:15 hello systemd[1]: Starting Network Manager Script Dispatcher Service...
Jan 06 09:26:15 hello systemd-hostnamed[5372]: Changed host name to 'hello'
Jan 06 09:26:15 hello NetworkManager[746]: <info>  [1578320775.8324] policy: set-hostname: set hostname to 'hello' (from system configuration)
Jan 06 09:26:15 hello dbus-daemon[671]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jan 06 09:26:15 hello systemd[1]: Started Network Manager Script Dispatcher Service.
Jan 06 09:26:15 hello nm-dispatcher[5373]: Failed to retrieve unit state: Access denied
Jan 06 09:26:15 hello nm-dispatcher[5373]: Failed to retrieve unit state: Access denied
Comment 10 Lukas Vrabec 2020-03-27 12:28:39 UTC 
*** Bug 1817989 has been marked as a duplicate of this bug. ***
Comment 13 Zdenek Pytela 2020-09-03 04:48:13 UTC 
*** Bug 1874929 has been marked as a duplicate of this bug. ***
Comment 14 Alois Mahdal 2020-09-16 16:16:37 UTC 
*** Bug 1879619 has been marked as a duplicate of this bug. ***
Comment 25 errata-xmlrpc 2021-05-18 14:57:35 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 (selinux-policy 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-2021:1639
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