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Bug 2000488 - Confined sysadm users cannot execute "realm list" command
Summary: Confined sysadm users cannot execute "realm list" command
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.4
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 8.6
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks: 1778780
TreeView+ depends on / blocked
 
Reported: 2021-09-02 09:19 UTC by Renaud Métrich
Modified: 2024-12-20 20:54 UTC (History)
3 users (show)

Fixed In Version: selinux-policy-3.14.3-83.el8
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-05-10 15:15:05 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-95969 0 None None None 2021-09-02 09:19:50 UTC
Red Hat Product Errata RHBA-2022:1995 0 None None None 2022-05-10 15:15:23 UTC

Description Renaud Métrich 2021-09-02 09:19:30 UTC 
Description of problem:

sysadm_t doesn't have the capability of sending DBus messages to realmd_t type (used by realmd daemon):

-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
# sesearch -A -s sysadm_t -t realmd_t -c dbus -p send_msg
--> no rule
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

Related USER_AVC:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
type=USER_AVC msg=audit(07/28/2021 11:02:36.395:184922) : pid=1787 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=:1.22238 spid=8937 tpid=8941 scontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:realmd_t:s0 tclass=dbus  exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?'
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

This hence prevents confined admins from executing "realm list" and other commands.
See also related BZ #1965251 for a generic solution.


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

RHEL7 and 8


How reproducible:

Always
Comment 1 Zdenek Pytela 2021-11-09 17:52:59 UTC 
To backport:
commit f119cd1331e8c09018216887bf0fb35e48fd91e4 (HEAD -> rawhide, upstream/rawhide)
Author: Zdenek Pytela <zpytela>
Date:   Mon Nov 8 14:47:12 2021 +0100

    Allow sysadm_t dbus chat with realmd_t
Comment 11 errata-xmlrpc 2022-05-10 15:15:05 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-2022:1995
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