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Bug 1730204 - the timedatex service runs as unconfined_service_t
Summary: the timedatex service runs as unconfined_service_t
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.1
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 8.2
Assignee: Lukas Vrabec
QA Contact: Milos Malik
Jan Fiala
URL:
Whiteboard:
Depends On:
Blocks: 1726199
TreeView+ depends on / blocked
 
Reported: 2019-07-16 07:41 UTC by Milos Malik
Modified: 2020-04-28 16:41 UTC (History)
7 users (show)

Fixed In Version: selinux-policy-3.14.3-26.el8
Doc Type: Enhancement
Doc Text:
.New SELinux types enable services to run confined This update introduces new SELinux types that enable the following services to run as confined services in SELinux enforcing mode instead of running in the `unconfined_service_t` domain: * `lldpd` now runs as `lldpad_t` * `rrdcached` now runs as `rrdcached_t` * `stratisd` now runs as `stratisd_t` * `timedatex` now runs as `timedatex_t`
Clone Of:
Environment:
Last Closed: 2020-04-28 16:40:41 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:1773 0 None None None 2020-04-28 16:41:12 UTC

Description Milos Malik 2019-07-16 07:41:26 UTC 
Description of problem:
 * the service is shipped but it is not confined

Version-Release number of selected component (if applicable):
selinux-policy-3.14.3-9.el8.noarch
selinux-policy-targeted-3.14.3-9.el8.noarch
timedatex-0.5-3.el8.x86_64

How reproducible:
 * always

Steps to Reproduce:
1. get a RHEL-8.1 machine (targeted policy is active)
# service timedatex status
Redirecting to /bin/systemctl status timedatex.service
● timedatex.service - System clock and RTC settings service
   Loaded: loaded (/usr/lib/systemd/system/timedatex.service; enabled; vendor preset: enabled)
   Active: inactive (dead)
# service timedatex start
Redirecting to /bin/systemctl start timedatex.service
# service timedatex status
Redirecting to /bin/systemctl status timedatex.service
● timedatex.service - System clock and RTC settings service
   Loaded: loaded (/usr/lib/systemd/system/timedatex.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2019-07-16 03:34:42 EDT; 1s ago
 Main PID: 1702 (timedatex)
    Tasks: 4 (limit: 11518)
   Memory: 1.3M
   CGroup: /system.slice/timedatex.service
           └─1702 /usr/sbin/timedatex

Jul 16 03:34:42 intentionally-removed systemd[1]: ...
Jul 16 03:34:42 intentionally-removed systemd[1]: ...
Hint: Some lines were ellipsized, use -l to show in full.
# ps -efZ | grep time
system_u:system_r:unconfined_service_t:s0 root 1702 1  0 03:34 ?       00:00:00 /usr/sbin/timedatex
unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 root 1718 1241  0 03:34 pts/0 00:00:00 grep --color=auto time
#

Actual results:
 * the timedatex service is not confined

Expected results:
 * the timedatex service is confined
Comment 1 Nikola Knazekova 2019-07-25 11:47:16 UTC 
PR for Fedora: https://github.com/fedora-selinux/selinux-policy-contrib/pull/124
Comment 6 Milos Malik 2019-09-18 07:02:57 UTC 
Following SELinux denials were found on Fedora 31 machines during yesterday's testing session with interns:
----
type=USER_AVC msg=audit(09/18/2019 03:01:38.324:319) : 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 cmdline="/usr/sbin/timedatex" scontext=system_u:system_r:timedatex_t:s0 tcontext=system_u:system_r:init_t:s0 tclass=system permissive=0  exe=/usr/lib/systemd/systemd sauid=root hostname=? addr=? terminal=?' 
----
type=USER_AVC msg=audit(09/18/2019 03:01:38.828:321) : 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/systemd-timesyncd.service cmdline="/usr/sbin/timedatex" scontext=system_u:system_r:timedatex_t:s0 tcontext=system_u:object_r:systemd_timedated_unit_file_t:s0 tclass=service permissive=0  exe=/usr/lib/systemd/systemd sauid=root hostname=? addr=? terminal=?' 
----
type=USER_AVC msg=audit(09/18/2019 03:01:38.829:322) : 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/chronyd.service cmdline="/usr/sbin/timedatex" scontext=system_u:system_r:timedatex_t:s0 tcontext=system_u:object_r:chronyd_unit_file_t:s0 tclass=service permissive=0  exe=/usr/lib/systemd/systemd sauid=root hostname=? addr=? terminal=?' 
----
Comment 7 Milos Malik 2019-09-18 07:07:37 UTC 
During the same session we prepared the following policy module, which solves the issue:

# cat mypolicy.te 
policy_module(mypolicy, 1.0)

require {
	type timedatex_t;
	type systemd_timedated_unit_file_t;
	class service status;
}

#============= timedatex_t ==============
allow timedatex_t systemd_timedated_unit_file_t:service status;
chronyd_systemctl(timedatex_t)
init_status(timedatex_t)

#

No SELinux denials appear after loading this policy module.
Comment 25 errata-xmlrpc 2020-04-28 16:40:41 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
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