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Bug 1688671 - SELinux is preventing init_t to read session_dbusd_tmp_t directories
Summary: SELinux is preventing init_t to read session_dbusd_tmp_t directories
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.2
Hardware: All
OS: Linux
medium
high
Target Milestone: rc
: 8.1
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
: 1766464 (view as bug list)
Depends On: 1673107
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-03-14 08:06 UTC by Cédric Jeanneret
Modified: 2020-11-14 14:08 UTC (History)
9 users (show)

Fixed In Version: selinux-policy-3.14.3-6
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-11-05 22:10:18 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Launchpad 1820019 0 None None None 2019-03-14 08:07:59 UTC
Red Hat Product Errata RHBA-2019:3547 0 None None None 2019-11-05 22:11:39 UTC

Description Cédric Jeanneret 2019-03-14 08:06:15 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
rpm-plugin-systemd-inhibit-4.14.2-9.el8.x86_64                                                                                                                                                                                                
python3-systemd-234-8.el8.x86_64                                                                                                                                                                                                              
systemd-libs-239-13.el8.x86_64                                                                                                                                                                                                                
systemd-pam-239-13.el8.x86_64                                                                                                                                                                                                                 
systemd-udev-239-13.el8.x86_64                                                                                                                                                                                                                
systemd-239-13.el8.x86_64                                                                                                                                                                                                                     
oci-systemd-hook-0.1.15-2.git2d0b8a3.module+el8+2769+577ad176.x86_64                                                                                                                                                                          

How reproducible:
Always


Steps to Reproduce:
1. Install a rhel8 system
2. Deploy RHOSP-15
3.

Actual results:
audit.log is spammed with:
type=AVC msg=audit(1552550628.422:5188): avc:  denied  { read } for  pid=95952 comm="systemd-user-ru" name="dbus-1" dev="tmpfs" ino=605557 scontext=system_u:system_r:init_t:s0 tcontext=unconfined_u:object_r:session_dbusd_tmp_t:s0 tclass=dir permissive=0
type=AVC msg=audit(1552550628.423:5189): avc:  denied  { read } for  pid=95952 comm="systemd-user-ru" name="dbus-1" dev="tmpfs" ino=605557 scontext=system_u:system_r:init_t:s0 tcontext=unconfined_u:object_r:session_dbusd_tmp_t:s0 tclass=dir permissive=0

Expected results:
Nothing like this should show up

Additional info:
journald log shows:
Mar 14 08:03:49 undercloud.localdomain setroubleshoot[95890]: SELinux is preventing /usr/lib/systemd/systemd-user-runtime-dir from read access on the directory dbus-1. For complete SELinux messages run: sealert -l d74972a4-9c79-48f7-83b3->
Mar 14 08:03:49 undercloud.localdomain platform-python[95890]: SELinux is preventing /usr/lib/systemd/systemd-user-runtime-dir from read access on the directory dbus-1.
                                                               
                                                               *****  Plugin catchall (100. confidence) suggests   **************************
                                                               
                                                               If you believe that systemd-user-runtime-dir should be allowed read access on the dbus-1 directory by default.
                                                               Then you should report this as a bug.
                                                               You can generate a local policy module to allow this access.
                                                               Do
                                                               allow this access for now by executing:
                                                               # ausearch -c 'systemd-user-ru' --raw | audit2allow -M my-systemduserru
                                                               # semodule -X 300 -i my-systemduserru.pp


The policy looks like:
allow init_t session_dbusd_tmp_t:dir read;

I'm not sure we won't need write or other rights (will test on my own and report update here).

Thank you for your support!

Cheers,

C.
Comment 5 Milos Malik 2019-04-26 08:58:47 UTC 
Is it possible that the directory (mentioned in comment#0) was mislabeled ?

# find /run/ -context \*session_dbusd_tmp_t\*
/run/user/0/dbus-1
/run/user/0/dbus-1/services
/run/user/42/dbus-1
/run/user/42/dbus-1/services
# restorecon -Rv /run/
Relabeled /run/user/0/dbus-1 from unconfined_u:object_r:session_dbusd_tmp_t:s0 to unconfined_u:object_r:user_tmp_t:s0
Relabeled /run/user/0/dbus-1/services from unconfined_u:object_r:session_dbusd_tmp_t:s0 to unconfined_u:object_r:user_tmp_t:s0
Relabeled /run/user/42/dbus-1 from unconfined_u:object_r:session_dbusd_tmp_t:s0 to unconfined_u:object_r:user_tmp_t:s0
Relabeled /run/user/42/dbus-1/services from unconfined_u:object_r:session_dbusd_tmp_t:s0 to unconfined_u:object_r:user_tmp_t:s0
#
Comment 6 Lukas Vrabec 2019-05-17 21:18:31 UTC 
commit 1f11e1d145b299da5899271b7af4f4b2bb3c2dea (HEAD -> rhel8.1-base, origin/rhel8.1-base)
Author: Lukas Vrabec <lvrabec>
Date:   Fri May 17 23:16:50 2019 +0200

    Allow init_t to manage session_dbusd_tmp_t dirs
    Resolves: rhbz#1688671

commit ad0ca80e163eb102b1fc9eb6322d82577c4c5ac8 (HEAD -> rhel8.1-contrib, origin/rhel8.1-contrib)
Author: Lukas Vrabec <lvrabec>
Date:   Fri May 17 23:14:55 2019 +0200

    Label /var/run/user/*/dbus-1 as session_dbusd_tmp_t
    Resolves:rhbz#1688671
Comment 9 Lukas Vrabec 2019-10-29 11:41:46 UTC 
*** Bug 1766464 has been marked as a duplicate of this bug. ***
Comment 11 errata-xmlrpc 2019-11-05 22:10:18 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-2019:3547
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