Bug 1287313
| Summary: | SELinux is preventing /usr/bin/python2.7 (policyd-spf) from name_bind access on the tcp_socket port | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Anthony Messina <amessina> |
| Component: | postfix | Assignee: | Jaroslav Škarvada <jskarvad> |
| Status: | CLOSED CANTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 23 | CC: | amessina, bojan, dwalsh, jskarvad |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-12-02 13:25:34 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: | |||
What port is a default port? (In reply to Miroslav Grepl from comment #1) > What port is a default port? It seems to use a wide range of TCP ports. Unfortunately due to the issues between python-ipaddr and python-ipaddress (Bug #1232595), I can't test right now. This message is a reminder that Fedora 23 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 23. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '23'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 23 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. pypolicyd-spf with IPv6 addresses is still broken so I cannot test. I'll reopen if it's an issue when the Python IPv6 parsing improves. |
When using pypolicyd-spf with Postfix, pypolicyd-spf needs to open ports to function. I often get SELinux denials like the following, with the port numbers changing if pypolicyd-spf happens to hit a port that is labeled by some other policy. While the suggestion is enabling the 'nis_enabled' boolean, I am hoping that the SELinux team can come up with a better solution like a boolean that's perhaps narrowed to pypolicyd-spf. Thanks. SELinux is preventing /usr/bin/python2.7 from name_bind access on the tcp_socket port 22874. ***** Plugin bind_ports (92.2 confidence) suggests ************************ If you want to allow /usr/bin/python2.7 to bind to network port 22874 Then you need to modify the port type. Do # semanage port -a -t PORT_TYPE -p tcp 22874 where PORT_TYPE is one of the following: amavisd_send_port_t, smtp_port_t, spamd_port_t. ***** Plugin catchall_boolean (7.83 confidence) suggests ****************** If you want to allow system to run with NIS Then you must tell SELinux about this by enabling the 'nis_enabled' boolean. Do setsebool -P nis_enabled 1 ***** Plugin catchall (1.41 confidence) suggests ************************** If you believe that python2.7 should be allowed name_bind access on the port 22874 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: # grep policyd-spf /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:postfix_master_t:s0 Target Context system_u:object_r:unreserved_port_t:s0 Target Objects port 22874 [ tcp_socket ] Source policyd-spf Source Path /usr/bin/python2.7 Port 22874 Host example.com Source RPM Packages python-2.7.10-8.fc22.x86_64 Target RPM Packages Policy RPM selinux-policy-3.13.1-128.21.fc22.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name example.com Platform Linux example.com 4.2.6-201.fc22.x86_64 #1 SMP Tue Nov 24 18:42:39 UTC 2015 x86_64 x86_64 Alert Count 2 First Seen 2015-12-01 17:02:59 CST Last Seen 2015-12-01 17:02:59 CST Local ID 95335df4-f17f-4adf-88fb-7dd8f8c12001 Raw Audit Messages type=AVC msg=audit(1449010979.552:1878): avc: denied { name_bind } for pid=5976 comm="policyd-spf" src=22874 scontext=system_u:system_r:postfix_master_t:s0 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=tcp_socket permissive=0 type=SYSCALL msg=audit(1449010979.552:1878): arch=x86_64 syscall=bind success=no exit=EACCES a0=4 a1=7ffeaf74fcf0 a2=10 a3=1999999999999999 items=0 ppid=5975 pid=5976 auid=4294967295 uid=99 gid=99 euid=99 suid=99 fsuid=99 egid=99 sgid=99 fsgid=99 tty=(none) ses=4294967295 comm=policyd-spf exe=/usr/bin/python2.7 subj=system_u:system_r:postfix_master_t:s0 key=(null) Hash: policyd-spf,postfix_master_t,unreserved_port_t,tcp_socket,name_bind