Bug 1828809
| Summary: | SELinux prevents the sysadm_u processes from D-bus talk to accounts-daemon | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Milos Malik <mmalik> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 8.2 | CC: | lvrabec, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | Keywords: | AutoVerified, Triaged |
| Target Release: | 8.3 | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | No Doc Update | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-11-04 01:56:37 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1778780 | ||
Milosi, Apart from the denial, was there any problem or did the action continue? These are rules we currently have in RHEL 8 for user domains: rhel8# sesearch -A -s userdomain -t accountsd_t -c dbus -p send_msg allow dbusd_unconfined nsswitch_domain:dbus send_msg; allow dbusd_unconfined system_bus_type:dbus send_msg; allow staff_usertype accountsd_t:dbus send_msg; allow unconfined_t accountsd_t:dbus send_msg; allow unconfined_t system_bus_type:dbus send_msg; allow user_usertype accountsd_t:dbus send_msg; allow xguest_usertype accountsd_t:dbus send_msg; rhel8# sesearch --dontaudit -s userdomain -t accountsd_t -c dbus -p send_msg dontaudit xguest_t system_bus_type:dbus send_msg; The X session worked fine for the sysadm_u user. There were 2 additional denials related to gnome-keyring-daemon and gsd-rfkill, but that's all. I've submitted a Fedora PR to address the issue: https://github.com/fedora-selinux/selinux-policy/pull/384 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-2020:4528 |
Description of problem: Version-Release number of selected component (if applicable): accountsservice-0.6.50-8.el8.x86_64 accountsservice-libs-0.6.50-8.el8.x86_64 selinux-policy-3.14.3-43.el8.noarch selinux-policy-devel-3.14.3-43.el8.noarch selinux-policy-doc-3.14.3-43.el8.noarch selinux-policy-minimum-3.14.3-43.el8.noarch selinux-policy-mls-3.14.3-43.el8.noarch selinux-policy-sandbox-3.14.3-43.el8.noarch selinux-policy-targeted-3.14.3-43.el8.noarch How reproducible: * always Steps to Reproduce: 1. get a RHEL-8.2 machine (targeted policy is active) 2. create a sysadm_u user 3. enable the xdm_sysadm_login boolean 4. log into X session as the sysadm_u user 5. click on Account Settings in the menu Actual results (enforcing mode): ---- type=USER_AVC msg=audit(04/28/2020 13:48:04.224:1036) : pid=1044 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.Accounts member=FindUserById dest=:1.1385 spid=15451 tpid=8747 scontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:accountsd_t:s0 tclass=dbus permissive=0 exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?' ---- type=USER_AVC msg=audit(04/28/2020 13:48:09.130:1039) : pid=1044 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.Accounts member=ListCachedUsers dest=:1.1385 spid=15451 tpid=8747 scontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:accountsd_t:s0 tclass=dbus permissive=0 exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?' ---- Expected results: * no SELinux denials