Bug 1532015

Summary: SELinux is preventing systemd from 'create' accesses on the tcp_socket port None (lpr)
Product: [Fedora] Fedora Reporter: Villy Kruse <ppywlkiqletw>
Component: selinux-policyAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 27CC: dwalsh, lvrabec, mgrepl, plautrba, pmoore
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Unspecified   
Whiteboard: abrt_hash:423be203d73fb63899e99d081f9565dc653d81ac418af48b3b0f6e94aa5011a2;
Fixed In Version: selinux-policy-3.13.1-283.28.fc27 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-03-20 18:16:04 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Villy Kruse 2018-01-07 12:42:39 UTC
Description of problem:
systemctl start cups-lpd.socket

systemd needs to be able to open and listen on the lpr socket (tcp port 515)

To fix, add this rule:

  allow init_t cupsd_lpd_t:tcp_socket { bind create listen setopt };
SELinux is preventing systemd from 'create' accesses on the tcp_socket port None.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that systemd should be allowed create access on the port None tcp_socket 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' --raw | audit2allow -M my-systemd
# semodule -X 300 -i my-systemd.pp

Additional Information:
Source Context                system_u:system_r:init_t:s0
Target Context                system_u:system_r:cupsd_lpd_t:s0
Target Objects                port None [ tcp_socket ]
Source                        systemd
Source Path                   systemd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-283.21.fc27.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 4.14.11-300.fc27.i686+PAE #1 SMP
                              Wed Jan 3 14:14:43 UTC 2018 i686 i686
Alert Count                   2
First Seen                    2018-01-07 13:18:40 CET
Last Seen                     2018-01-07 13:35:08 CET
Local ID                      718681e6-e0da-4337-ba8a-f0960f53effe

Raw Audit Messages
type=AVC msg=audit(1515328508.799:232): avc:  denied  { create } for  pid=1 comm="systemd" scontext=system_u:system_r:init_t:s0 tcontext=system_u:system_r:cupsd_lpd_t:s0 tclass=tcp_socket permissive=1


Hash: systemd,init_t,cupsd_lpd_t,tcp_socket,create

Version-Release number of selected component:
selinux-policy-3.13.1-283.21.fc27.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.3
hashmarkername: setroubleshoot
kernel:         4.14.11-300.fc27.i686+PAE
type:           libreport

Comment 1 Fedora Update System 2018-03-07 17:10:40 UTC
selinux-policy-3.13.1-283.27.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-32ebae3424

Comment 2 Fedora Update System 2018-03-08 16:21:26 UTC
selinux-policy-3.13.1-283.27.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-32ebae3424

Comment 3 Villy Kruse 2018-03-10 04:15:36 UTC
Issue not fixed.


commit aa5973b6e2c3265bae9389dc413e4842725f18b0 allows socket activation via a unix socket.

Needed is socket activation via TCP socket port 515.

Comment 4 Villy Kruse 2018-03-10 04:18:31 UTC
Installed packages

selinux-policy.noarch                 3.13.1-283.27.fc27        @updates-testing
selinux-policy-devel.noarch           3.13.1-283.27.fc27        @updates-testing
selinux-policy-doc.noarch             3.13.1-283.27.fc27        @updates-testing
selinux-policy-targeted.noarch        3.13.1-283.27.fc27        @updates-testing

Selinux issues

type=AVC msg=audit(1520654159.008:218): avc:  denied  { create } for  pid=1 comm="systemd" scontext=s
ystem_u:system_r:init_t:s0 tcontext=system_u:system_r:cupsd_lpd_t:s0 tclass=tcp_socket permissive=1
type=AVC msg=audit(1520654159.008:219): avc:  denied  { setopt } for  pid=1 comm="systemd" scontext=s
ystem_u:system_r:init_t:s0 tcontext=system_u:system_r:cupsd_lpd_t:s0 tclass=tcp_socket permissive=1
type=AVC msg=audit(1520654159.008:220): avc:  denied  { bind } for  pid=1 comm="systemd" scontext=sys
tem_u:system_r:init_t:s0 tcontext=system_u:system_r:cupsd_lpd_t:s0 tclass=tcp_socket permissive=1
type=AVC msg=audit(1520654159.009:221): avc:  denied  { listen } for  pid=1 comm="systemd" lport=515
scontext=system_u:system_r:init_t:s0 tcontext=system_u:system_r:cupsd_lpd_t:s0 tclass=tcp_socket perm
issive=1

Comment 5 Fedora Update System 2018-03-12 18:17:08 UTC
selinux-policy-3.13.1-283.28.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-32ebae3424

Comment 6 Fedora Update System 2018-03-14 01:34:35 UTC
selinux-policy-3.13.1-283.28.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-32ebae3424

Comment 7 Villy Kruse 2018-03-14 04:59:53 UTC
Issue not fixed.

No change between selinux-policy-3.13.1-283.27.fc27 and selinux-policy-3.13.1-283.28.fc27.

Comment 8 Fedora Update System 2018-03-20 18:16:04 UTC
selinux-policy-3.13.1-283.28.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.