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Bug 2083504 - samba-dcerpcd and samba rpcd programs need selinux-policy permissions
Summary: samba-dcerpcd and samba rpcd programs need selinux-policy permissions
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.7
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: 8.7
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
: 2097629 2097942 (view as bug list)
Depends On:
Blocks: 2083509 2083511
TreeView+ depends on / blocked
 
Reported: 2022-05-10 09:23 UTC by Pavel Filipensky
Modified: 2022-12-15 16:18 UTC (History)
6 users (show)

Fixed In Version: selinux-policy-3.14.3-103.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
: 2083509 (view as bug list)
Environment:
Last Closed: 2022-11-08 10:44:16 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github fedora-selinux selinux-policy pull 1219 0 None Merged Add support for samba-dcerpcd 2022-06-07 18:26:09 UTC
Github fedora-selinux selinux-policy pull 1227 0 None open Update policy for samba-dcerpcd 2022-06-09 07:52:51 UTC
Red Hat Bugzilla 2096857 1 medium CLOSED policy blocks systemd / sd-mkdcreds from creating service credentials on tmpfs 2023-10-24 13:51:00 UTC
Red Hat Issue Tracker RHELPLAN-121540 0 None None None 2022-05-10 09:30:19 UTC
Red Hat Product Errata RHBA-2022:7691 0 None None None 2022-11-08 10:45:03 UTC

Internal Links: 2096825

Description Pavel Filipensky 2022-05-10 09:23:24 UTC 
After RHEL 8.7 rebase to samba 4.16.1 the samba test fails because of missing selinux policy permissions. Samba has added new programs (Release Notes https://www.samba.org/samba/history/samba-4.16.0.html).

Please give the needed permissions to these programs:

# ls -lZ /usr/libexec/samba/
lrwxrwxrwx. 1 root root system_u:object_r:bin_t:s0      34 Apr 23  2021 cups_backend_smb -> /etc/alternatives/cups_backend_smb
-rwxr-xr-x  1 root root ?                          1428008 Feb 15 12:31 rpcd_classic
-rwxr-xr-x  1 root root ?                            45168 Feb 15 12:31 rpcd_epmapper
-rwxr-xr-x  1 root root ?                            78104 Feb 15 12:31 rpcd_fsrvp
-rwxr-xr-x  1 root root ?                           424552 Feb 15 12:31 rpcd_lsad
-rwxr-xr-x  1 root root ?                           128712 Feb 15 12:31 rpcd_mdssvc
-rwxr-xr-x  1 root root ?                            28768 Feb 15 12:31 rpcd_rpcecho
-rwxr-xr-x  1 root root ?                           512976 Feb 15 12:31 rpcd_spoolss
-rwxr-xr-x  1 root root ?                            90712 Feb 15 12:31 rpcd_winreg
-rwxr-xr-x  1 root root ?                           525464 Feb 15 12:31 samba-bgqd
-rwxr-xr-x  1 root root ?                           197960 Feb 15 12:31 samba-dcerpcd


The denied access is here:


avc:  denied  { write } for  pid=53381 comm="samba-dcerpcd" name="samba-dcerpcd.pid" dev="tmpfs"
avc:  denied  { setgid } for  pid=53485 comm="rpcd_lsad"


and here:


type=AVC msg=audit(1652102482.309:2296): avc:  denied  { setgid } for  pid=52973 comm="rpcd_lsad" capability=6  scontext=system_u:system_r:winbind_t:s0 tcontext=system_u:system_r:winbind_t:s0 tclass=capability permissive=0            
type=AVC msg=audit(1652102482.934:2300): avc:  denied  { setgid } for  pid=52995 comm="rpcd_lsad" capability=6  scontext=system_u:system_r:winbind_t:s0 tcontext=system_u:system_r:winbind_t:s0 tclass=capability permissive=0
type=AVC msg=audit(1652102483.579:2304): avc:  denied  { setgid } for  pid=53015 comm="rpcd_lsad" capability=6  scontext=system_u:system_r:winbind_t:s0 tcontext=system_u:system_r:winbind_t:s0 tclass=capability permissive=0
type=AVC msg=audit(1652102484.263:2308): avc:  denied  { setgid } for  pid=53035 comm="rpcd_lsad" capability=6  scontext=system_u:system_r:winbind_t:s0 tcontext=system_u:system_r:winbind_t:s0 tclass=capability permissive=0
type=AVC msg=audit(1652102484.985:2312): avc:  denied  { setgid } for  pid=53056 comm="rpcd_lsad" capability=6  scontext=system_u:system_r:winbind_t:s0 tcontext=system_u:system_r:winbind_t:s0 tclass=capability permissive=0


Full logs:


http://idm-artifacts.usersys.redhat.com/samba/Nightly/RHEL8.7/2022-04-17/tier-1/tier1_ws2019/7/tier1-restraint.01/recipes/1/tasks/10/results/1652101918/logs/avc.log
http://idm-artifacts.usersys.redhat.com/samba/Nightly/RHEL8.7/2022-04-17/tier-1/tier1_ws2019/7/tier1-restraint.01/recipes/1/tasks/10/results/1652101914/logs/avc.log
Comment 1 Pavel Filipensky 2022-05-10 09:27:54 UTC 
The denied access: denied  { write } for  pid=53381 comm="samba-dcerpcd" name="samba-dcerpcd.pid" dev="tmpfs"
needs to be fixed via granting access for "/run"  (for pid files) - see smb.conf(5):

   pid directory (G)

       This option specifies the directory where pid files will be placed.

       Default: pid directory = /run

       Example: pid directory = /var/run/
Comment 13 Zdenek Pytela 2022-06-09 09:04:55 UTC 
Commits to backport:
commit 044ed83f8ebde938bbc49f6e071a8548ddc8505d (HEAD -> rawhide, upstream/rawhide)
Author: Zdenek Pytela <zpytela>
Date:   Wed Jun 8 16:24:15 2022 +0200

    Update policy for samba-dcerpcd

commit c23c6a5242560e8a9946db5bf4440adc0f39febc
Author: Zdenek Pytela <zpytela>
Date:   Mon Jan 4 20:24:23 2021 +0100

    Allow domain read usermodehelper state information

commit 6a57649e555f8e1cf8f65eea2e659d969b9fe8f2
Author: Zdenek Pytela <zpytela>
Date:   Mon Jan 4 19:50:49 2021 +0100

    Remove all kernel_read_usermodehelper_state() interface calls
Comment 16 Bruno Goncalves 2022-06-16 08:04:57 UTC 
*** Bug 2097629 has been marked as a duplicate of this bug. ***
Comment 17 Milos Malik 2022-06-17 07:19:13 UTC 
*** Bug 2097942 has been marked as a duplicate of this bug. ***
Comment 22 Zdenek Pytela 2022-06-28 09:21:04 UTC 
This one aplies to RHEL 8, too:
commit 837f63743214363362334e910dcb06d35cd5cb99 (HEAD -> rawhide, upstream/rawhide)
Author: Zdenek Pytela <zpytela>
Date:   Mon Jun 27 17:22:40 2022 +0200

    Update samba-dcerpcd policy for kerberos usage 2
Comment 23 Zdenek Pytela 2022-06-28 18:35:12 UTC 
The additional denials found by the automated test will be fixed with
https://bugzilla.redhat.com/show_bug.cgi?id=2096825
Comment 33 errata-xmlrpc 2022-11-08 10:44:16 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-2022:7691
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