Bug 1398857
| Summary: | gssproxy/rpc.gssd/dbus SELinux denials | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Anthony Messina <amessina> |
| Component: | selinux-policy-targeted | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Ben Levenson <benl> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 25 | CC: | dwalsh |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-01-14 18:36:12 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: | |||
I would check if this would run without the net_admin. You probably do not need to give this access. dontaudit gssproxy_t self:capability net_admin; (In reply to Daniel Walsh from comment #1) > I would check if this would run without the net_admin. You probably do not > need to give this access. > > dontaudit gssproxy_t self:capability net_admin; Thanks Dan. Upstream gssproxy also states they don't need cap_net_admin. In enforcing mode, I don't get the gssproxy AVC and things work: AVC avc: denied { net_admin } for pid=819 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability However, I still do get the rpc.gssd AVCs related to /run/dbus/system_bus_socket AVC avc: denied { write } for pid=1964 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=18837 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=0 Yes this looks like gssd is sending a dbus message to someone. Should be allowed. With recent updates that removed the need to run rpc.gssd in the foreground, I no longer see these issues. |
With a fresh install of F25, gssproxy & rpc.gssd doesn't work properly due to SELinux denials. In this case, rpc.gssd is being run from systemd with Type=simple and ExecStart=/usr/sbin/rpc.gssd -fv (in the foreground) due to #1264556. This change at least allows rpc.gssd to run for NFS/KRB mount /home. AVC avc: denied { net_admin } for pid=819 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability permissive=1 AVC avc: denied { write } for pid=819 comm="gssproxy" name="system_bus_socket" dev="tmpfs" ino=17992 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { net_admin } for pid=852 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability permissive=1 AVC avc: denied { write } for pid=852 comm="gssproxy" name="system_bus_socket" dev="tmpfs" ino=17758 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { net_admin } for pid=817 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability permissive=1 AVC avc: denied { write } for pid=817 comm="gssproxy" name="system_bus_socket" dev="tmpfs" ino=13270 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { net_admin } for pid=817 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability permissive=1 AVC avc: denied { write } for pid=817 comm="gssproxy" name="system_bus_socket" dev="tmpfs" ino=13270 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=817 comm="gssproxy" name="system_bus_socket" dev="tmpfs" ino=13270 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { net_admin } for pid=817 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability permissive=1 AVC avc: denied { net_admin } for pid=821 comm="gssproxy" capability=12 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:system_r:gssproxy_t:s0 tclass=capability permissive=1 AVC avc: denied { write } for pid=821 comm="gssproxy" name="system_bus_socket" dev="tmpfs" ino=18082 scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1109 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=17992 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1442 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=17992 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1055 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=17758 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1400 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=17758 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1102 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=13270 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1173 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=13270 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1394 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=13270 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1041 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=18082 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 AVC avc: denied { write } for pid=1059 comm="rpc.gssd" name="system_bus_socket" dev="tmpfs" ino=18082 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 ~]# cat fixgssproxy.te module fixgssproxy 1.0; require { type system_dbusd_var_run_t; type systemd_resolved_t; type system_dbusd_t; type gssproxy_t; class capability net_admin; class dbus send_msg; class sock_file write; } #============= gssproxy_t ============== allow gssproxy_t self:capability net_admin; allow gssproxy_t system_dbusd_t:dbus send_msg; allow gssproxy_t system_dbusd_var_run_t:sock_file write; allow gssproxy_t systemd_resolved_t:dbus send_msg; #============= systemd_resolved_t ============== allow systemd_resolved_t gssproxy_t:dbus send_msg; ~]# cat fixrpcgssd.te module fixrpcgssd 1.0; require { type system_dbusd_var_run_t; type gssd_t; class sock_file write; } #============= gssd_t ============== allow gssd_t system_dbusd_var_run_t:sock_file write;