Bug 1773463

Summary: SELinux prevents confined users from running resolvectl
Product: Red Hat Enterprise Linux 8 Reporter: Milos Malik <mmalik>
Component: selinux-policyAssignee: Zdenek Pytela <zpytela>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.2CC: lvrabec, mmalik, plautrba, ssekidde, zpytela
Target Milestone: rc   
Target Release: 8.2   
Hardware: All   
OS: Linux   
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Last Closed: 2020-04-28 16:41:41 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 1778780    

Description Milos Malik 2019-11-18 08:14:24 UTC
Description of problem:
$ resolvectl 
Failed to get global data: Access denied
$

Version-Release number of selected component (if applicable):
selinux-policy-3.14.3-26.el8.noarch
selinux-policy-targeted-3.14.3-26.el8.noarch
systemd-239-19.el8.x86_64
systemd-libs-239-19.el8.x86_64
systemd-pam-239-19.el8.x86_64
systemd-udev-239-19.el8.x86_64

How reproducible:
 * always

Steps to Reproduce:
1. get a RHEL-8.1 machine (targeted policy is active)
2. start the systemd-resolved service
3. log in as a confined user (user_u, staff_u, guest_u, xguest_u, sysadm_u)
4. run: resolvectl
5. search for SELinux denials

Actual results:
----
type=USER_AVC msg=audit(11/18/2019 03:02:13.846:410) : pid=596 uid=dbus auid=unset ses=unset subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for msgtype=method_call interface=org.freedesktop.DBus.Properties member=GetAll dest=org.freedesktop.resolve1 spid=5863 tpid=5851 scontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:systemd_resolved_t:s0 tclass=dbus permissive=0  exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?' 
----
type=USER_AVC msg=audit(11/18/2019 03:03:38.913:457) : pid=596 uid=dbus auid=unset ses=unset subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for msgtype=method_call interface=org.freedesktop.DBus.Properties member=GetAll dest=org.freedesktop.resolve1 spid=5930 tpid=5851 scontext=staff_u:staff_r:staff_t:s0-s0:c0.c1023 tcontext=system_u:system_r:systemd_resolved_t:s0 tclass=dbus permissive=0  exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?' 
----
type=USER_AVC msg=audit(11/18/2019 03:04:55.544:502) : pid=596 uid=dbus auid=unset ses=unset subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for msgtype=method_call interface=org.freedesktop.DBus.Properties member=GetAll dest=org.freedesktop.resolve1 spid=5996 tpid=5851 scontext=user_u:user_r:user_t:s0 tcontext=system_u:system_r:systemd_resolved_t:s0 tclass=dbus permissive=0  exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?' 
----

Expected results:
 * no SELinux denials
 * resolvectl works as expected

Comment 12 errata-xmlrpc 2020-04-28 16:41:41 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, 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-2020:1773