Bug 1530275
| Summary: | Postfix generates AVCs when looking up unknown users | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Gustavo Maciel Dias Vieira <gustavo> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 27 | CC: | dwalsh, lvrabec, mgrepl, plautrba, pmoore |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-283.24.fc27 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-02-06 15:31:34 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: | |||
Got more AVCs, this ones are generated when the message with the invalid user is created locally:
type=AVC msg=audit(1516050518.457:467): avc: denied { write } for pid=4916 comm="local" name="system_bus_socket" dev="tmpfs" ino=19766 scontext=system_u:system_r:postfix_local_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1
type=USER_AVC msg=audit(1516050518.458:468): pid=554 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=org.freedesktop.DBus member=Hello dest=org.freedesktop.DBus spid=4916 scontext=system_u:system_r:postfix_local_t:s0 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=dbus permissive=1 exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'
type=USER_AVC msg=audit(1516050518.459:469): pid=554 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=org.freedesktop.systemd1.Manager member=LookupDynamicUserByName dest=org.freedesktop.systemd1 spid=4916 tpid=1 scontext=system_u:system_r:postfix_local_t:s0 tcontext=system_u:system_r:init_t:s0 tclass=dbus permissive=1 exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'
type=USER_AVC msg=audit(1516050518.460:470): pid=554 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=error error_name=org.freedesktop.systemd1.NoSuchDynamicUser dest=:1.41 spid=1 tpid=4916 scontext=system_u:system_r:init_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 tclass=dbus permissive=1 exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'
Adding this to the rest, audit2allow gives:
#============= init_t ==============
allow init_t postfix_local_t:dbus send_msg;
allow init_t postfix_master_t:dbus send_msg;
#============= postfix_local_t ==============
allow postfix_local_t init_t:dbus send_msg;
allow postfix_local_t system_dbusd_t:dbus send_msg;
allow postfix_local_t system_dbusd_var_run_t:sock_file write;
#============= postfix_master_t ==============
allow postfix_master_t init_t:dbus send_msg;
allow postfix_master_t system_dbusd_t:dbus send_msg;
allow postfix_master_t system_dbusd_var_run_t:sock_file write;
selinux-policy-3.13.1-283.24.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-a144eca5a8 selinux-policy-3.13.1-283.24.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-a144eca5a8 selinux-policy-3.13.1-283.24.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report. |
Description of problem: AVCs are generated when Postfix looks up unknown users. The AVCs are not generated for existing users. Version-Release number of selected component (if applicable): postfix-3.2.4-1.fc27.x86_64 selinux-policy-3.13.1-283.17.fc27.noarch How reproducible: Deterministic Steps to Reproduce: 1. Setup Postfix. I don't believe my setup is unusual in any way. 2. Sent a email to an unknown user 3. Additional info: AVCs: type=AVC msg=audit(1514891673.188:231): avc: denied { write } for pid=1354 comm="proxymap" name="system_bus_socket" dev="tmpfs" ino=19647 scontext=system_u:system_r:postfix_master_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=1 type=USER_AVC msg=audit(1514891673.192:232): pid=542 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=org.freedesktop.DBus member=Hello dest=org.freedesktop.DBus spid=1354 scontext=system_u:system_r:postfix_master_t:s0 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=dbus permissive=1 exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?' type=USER_AVC msg=audit(1514891673.193:233): pid=542 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=org.freedesktop.systemd1.Manager member=LookupDynamicUserByName dest=org.freedesktop.systemd1 spid=1354 tpid=1 scontext=system_u:system_r:postfix_master_t:s0 tcontext=system_u:system_r:init_t:s0 tclass=dbus permissive=1 exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?' type=USER_AVC msg=audit(1514891673.194:234): pid=542 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=error error_name=org.freedesktop.systemd1.NoSuchDynamicUser dest=:1.13 spid=1 tpid=1354 scontext=system_u:system_r:init_t:s0 tcontext=system_u:system_r:postfix_master_t:s0 tclass=dbus permissive=1 exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?' audit2allow: #============= init_t ============== allow init_t postfix_master_t:dbus send_msg; #============= postfix_master_t ============== allow postfix_master_t init_t:dbus send_msg; allow postfix_master_t system_dbusd_t:dbus send_msg; allow postfix_master_t system_dbusd_var_run_t:sock_file write;