Bug 1003177
Summary: | SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket | ||
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Product: | [Fedora] Fedora | Reporter: | Vladislav Grigoryev <vg.aetera> |
Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | medium | Docs Contact: | |
Priority: | unspecified | ||
Version: | 19 | CC: | dominick.grift, dwalsh, eddie.kuns, jpkrohling, lvrabec, matt_domsch, mgrepl, mike, Per.t.Sjoholm, radford, steve, vg.aetera |
Target Milestone: | --- | Keywords: | Reopened |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | selinux-policy-3.12.1-74.18.fc19 | Doc Type: | Bug Fix |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2014-02-17 21:07:27 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: |
Description
Vladislav Grigoryev
2013-08-31 14:04:17 UTC
I suppose 'name_bind' access to 'unreserved_port_t' for 'dkim_milter_t' is required to allow DKIM TXT records lookup to verify incoming emails signatures. Could you update selinux-policy package and try if problem still persists? $ audit2allow -i avc #============= dkim_milter_t ============== #!!!! This avc is allowed in the current policy allow dkim_milter_t unreserved_port_t:udp_socket name_bind; $ rpm -q selinux-policy selinux-policy-3.12.1-74.4.fc19.noarch I've done full yum update and reboot the server. # cat avc allow dkim_milter_t unreserved_port_t:udp_socket name_bind; # audit2allow -i avc Nothing to do # rpm -q selinux-policy opendkim selinux-policy-3.12.1-74.3.fc19.noarch opendkim-2.8.4-1.fc19.x86_64 But setroubleshoot is still flooding to the log. Some of the latest records: # grep SELinux /var/log/messages | tail -n3 Sep 19 09:28:50 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c Sep 19 09:31:26 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c Sep 19 09:42:51 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c Sealert details: # sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . ***** Plugin bind_ports (92.2 confidence) suggests ************************* If you want to allow /usr/sbin/opendkim to bind to network port 64803 Then you need to modify the port type. Do # semanage port -a -t -p udp 64803 ***** 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. You can read 'None' man page for more details. Do setsebool -P nis_enabled 1 ***** Plugin catchall (1.41 confidence) suggests *************************** If you believe that opendkim should be allowed name_bind access on the udp_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 opendkim /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:dkim_milter_t:s0 Target Context system_u:object_r:unreserved_port_t:s0 Target Objects [ udp_socket ] Source opendkim Source Path /usr/sbin/opendkim Port 64803 Host srv6.kola.fad.ru Source RPM Packages opendkim-2.8.4-1.fc19.x86_64 Target RPM Packages Policy RPM selinux-policy-3.12.1-74.3.fc19.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Permissive Host Name srv6.kola.fad.ru Platform Linux srv6.kola.fad.ru 3.10.11-200.fc19.x86_64 #1 SMP Mon Sep 9 13:03:01 UTC 2013 x86_64 x86_64 Alert Count 5332 First Seen 2013-07-29 20:30:23 MSK Last Seen 2013-09-19 09:55:45 MSK Local ID e858d3de-30c9-4dcd-ad2f-0b03946eb17c Raw Audit Messages type=AVC msg=audit(1379570145.913:1085): avc: denied { name_bind } for pid=2182 comm="opendkim" src=64803 scontext=system_u:system_r:dkim_milter_t:s0 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=udp_socket type=SYSCALL msg=audit(1379570145.913:1085): arch=x86_64 syscall=bind success=yes exit=0 a0=e a1=7f9e2c2876b0 a2=10 a3=7f9e3378a6cc items=0 ppid=1 pid=2182 auid=4294967295 uid=987 gid=986 euid=987 suid=987 fsuid=987 egid=986 sgid=986 fsgid=986 ses=4294967295 tty=(none) comm=opendkim exe=/usr/sbin/opendkim subj=system_u:system_r:dkim_milter_t:s0 key=(null) Hash: opendkim,dkim_milter_t,unreserved_port_t,udp_socket,name_bind (In reply to Lukas Vrabec from comment #2) > $ rpm -q selinux-policy > selinux-policy-3.12.1-74.4.fc19.noarch Looks like I should enable updates-testing repo. Please wait, I'll try it again. Finally I have: # rpm -q selinux-policy selinux-policy-3.12.1-74.4.fc19.noarch But result is the same: # grep SELinux /var/log/messages | tail -n1 Sep 19 12:34:39 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c So are you getting exactly the same AVC msg? (In reply to Miroslav Grepl from comment #6) > So are you getting exactly the same AVC msg? Yes, excluding timestamp and other random unreserved UDP port. # grep SELinux.*dkim /var/log/messages | tail -n3 Sep 26 07:58:14 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c Sep 26 08:12:12 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c Sep 26 08:25:08 srv6 setroubleshoot: SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . For complete SELinux messages. run sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c # sealert -l e858d3de-30c9-4dcd-ad2f-0b03946eb17c SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . ***** Plugin bind_ports (92.2 confidence) suggests ************************* If you want to allow /usr/sbin/opendkim to bind to network port 23467 Then you need to modify the port type. Do # semanage port -a -t -p udp 23467 ***** 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. You can read 'None' man page for more details. Do setsebool -P nis_enabled 1 ***** Plugin catchall (1.41 confidence) suggests *************************** If you believe that opendkim should be allowed name_bind access on the udp_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 opendkim /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:dkim_milter_t:s0 Target Context system_u:object_r:unreserved_port_t:s0 Target Objects [ udp_socket ] Source opendkim Source Path /usr/sbin/opendkim Port 23467 Host srv6.kola.fad.ru Source RPM Packages opendkim-2.8.4-1.fc19.x86_64 Target RPM Packages Policy RPM selinux-policy-3.12.1-74.4.fc19.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Permissive Host Name srv6.kola.fad.ru Platform Linux srv6.kola.fad.ru 3.10.11-200.fc19.x86_64 #1 SMP Mon Sep 9 13:03:01 UTC 2013 x86_64 x86_64 Alert Count 6161 First Seen 2013-07-29 20:30:23 MSK Last Seen 2013-09-26 08:40:10 MSK Local ID e858d3de-30c9-4dcd-ad2f-0b03946eb17c Raw Audit Messages type=AVC msg=audit(1380170410.449:9862): avc: denied { name_bind } for pid=1071 comm="opendkim" src=23467 scontext=system_u:system_r:dkim_milter_t:s0 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=udp_socket type=SYSCALL msg=audit(1380170410.449:9862): arch=x86_64 syscall=bind success=yes exit=0 a0=a a1=7f7b7c072a00 a2=1c a3=7f7b80c906c4 items=0 ppid=1 pid=1071 auid=4294967295 uid=987 gid=986 euid=987 suid=987 fsuid=987 egid=986 sgid=986 fsgid=986 ses=4294967295 tty=(none) comm=opendkim exe=/usr/sbin/opendkim subj=system_u:system_r:dkim_milter_t:s0 key=(null) Hash: opendkim,dkim_milter_t,unreserved_port_t,udp_socket,name_bind selinux-policy-3.12.1-74.8.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/selinux-policy-3.12.1-74.8.fc19 Package selinux-policy-3.12.1-74.8.fc19: * should fix your issue, * was pushed to the Fedora 19 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.12.1-74.8.fc19' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-17739/selinux-policy-3.12.1-74.8.fc19 then log in and leave karma (feedback). selinux-policy-3.12.1-74.8.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report. This is not fixed. $ rpm -q selinux-policy selinux-policy-3.12.1-74.12.fc19.noarch type=AVC msg=audit(1384798087.49:43344): avc: denied { name_bind } for pid=3373 comm="opendkim" src=64003 scontext=system_u:system_r:dkim_milter_t:s0 tcontext=system_u:object_r:traceroute_port_t:s0 tclass=udp_socket type=SYSCALL msg=audit(1384798087.49:43344): arch=x86_64 syscall=bind success=no exit=EACCES a0=12 a1=7fe54406df70 a2=10 a3=7fe5494c56dc items=0 ppid=1 pid=3373 auid=4294967295 uid=109 gid=108 euid=109 suid=109 fsuid=109 egid=108 sgid=108 fsgid=108 ses=4294967295 tty=(none) comm=opendkim exe=/usr/sbin/opendkim subj=system_u:system_r:dkim_milter_t:s0 key=(null) type=AVC msg=audit(1384798087.49:43345): avc: denied { name_bind } for pid=3373 comm="opendkim" src=12137 scontext=system_u:system_r:dkim_milter_t:s0 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=udp_socket type=SYSCALL msg=audit(1384798087.49:43345): arch=x86_64 syscall=bind success=no exit=EACCES a0=12 a1=7fe54406df70 a2=10 a3=7fe5494c56dc items=0 ppid=1 pid=3373 auid=4294967295 uid=109 gid=108 euid=109 suid=109 fsuid=109 egid=108 sgid=108 fsgid=108 ses=4294967295 tty=(none) comm=opendkim exe=/usr/sbin/opendkim subj=system_u:system_r:dkim_milter_t:s0 key=(null) I agree that this is not fixed: $ rpm -q selinux-policy selinux-policy-3.12.1-74.13.fc19.noarch type=AVC msg=audit(1385074343.789:1229): avc: denied { name_bind } for pid=3188 comm="opendkim" src=9369 scontext=system_u:system_r:dkim_milter_t:s0 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=udp_socket type=SYSCALL msg=audit(1385074343.789:1229): arch=x86_64 syscall=bind success=no exit=EACCES a0=d a1=7f922c064180 a2=10 a3=7f923304c6dc items=0 ppid=1 pid=3188 auid=4294967295 uid=977 gid=972 euid=977 suid=977 fsuid=977 egid=972 sgid=972 fsgid=972 ses=4294967295 tty=(none) comm=opendkim exe=/usr/sbin/opendkim subj=system_u:system_r:dkim_milter_t:s0 key=(null) Hash: opendkim,dkim_milter_t,unreserved_port_t,udp_socket,name_bind (In reply to Edward Kuns from comment #12) > I agree that this is not fixed: Confirm. # LANG=C sealert -l e2a7ea78-1c2c-4f72-b6fc-53f47af5a6e2 SELinux is preventing /usr/sbin/opendkim from name_bind access on the udp_socket . ***** Plugin bind_ports (92.2 confidence) suggests ************************* If you want to allow /usr/sbin/opendkim to bind to network port 17268 Then you need to modify the port type. Do # semanage port -a -t -p udp 17268 ***** 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. You can read 'None' man page for more details. Do setsebool -P nis_enabled 1 ***** Plugin catchall (1.41 confidence) suggests *************************** If you believe that opendkim should be allowed name_bind access on the udp_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 opendkim /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:dkim_milter_t:s0 Target Context system_u:object_r:unreserved_port_t:s0 Target Objects [ udp_socket ] Source opendkim Source Path /usr/sbin/opendkim Port 17268 Host srv6.kola.fad.ru Source RPM Packages opendkim-2.8.4-1.fc19.x86_64 Target RPM Packages Policy RPM selinux-policy-3.12.1-74.13.fc19.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Permissive Host Name srv6.kola.fad.ru Platform Linux srv6.kola.fad.ru 3.11.8-200.fc19.x86_64 #1 SMP Wed Nov 13 16:29:59 UTC 2013 x86_64 x86_64 Alert Count 6219 First Seen 2013-10-04 08:45:18 MSK Last Seen 2013-11-22 07:36:43 MSK Local ID e2a7ea78-1c2c-4f72-b6fc-53f47af5a6e2 Raw Audit Messages type=AVC msg=audit(1385091403.722:996): avc: denied { name_bind } for pid=1555 comm="opendkim" src=17268 scontext=system_u:system_r:dkim_milter_t:s0 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=udp_socket type=SYSCALL msg=audit(1385091403.722:996): arch=x86_64 syscall=bind success=yes exit=0 a0=d a1=7f9c5c2877f0 a2=1c a3=7f9c6098b6d4 items=0 ppid=1 pid=1555 auid=4294967295 uid=987 gid=986 euid=987 suid=987 fsuid=987 egid=986 sgid=986 fsgid=986 ses=4294967295 tty=(none) comm=opendkim exe=/usr/sbin/opendkim subj=system_u:system_r:dkim_milter_t:s0 key=(null) Hash: opendkim,dkim_milter_t,unreserved_port_t,udp_socket,name_bind Any update on this? Does opendkim use random ports? Do you have NIS enabled? Miroslav, see comment #1. Yes, they would be random, but OpenDKIM is not listening on these ports. No, this has nothing to do with NIS. The note in sealert is a false positive. I also do not have NIS enabled. The ports complained about appear to be outgoing ports (?), not ones it is listening on. I have it listening on whatever the default is. I have not changed that. I would just allow it to bind to all udp ports. (In reply to Michael Cronenworth from comment #16) > Miroslav, see comment #1. Yes, they would be random, but OpenDKIM is not > listening on these ports. No, this has nothing to do with NIS. The note in > sealert is a false positive. Yeap, I overlooked it. Thx. What do we need to do to progress this? Do we just need to figure out the correct change to selinux policy? On EL6, I found I also needed this change with opendkim-2.9.0-2.el6.i686: module opendkim 1.0; require { type dkim_milter_t; class process signull; } #============= dkim_milter_t ============== # src="dkim_milter_t" tgt="dkim_milter_t" class="process", perms="signull" # comm="opendkim" exe="" path="" allow dkim_milter_t self:process signull; due to these: type=AVC msg=audit(1390189131.016:48625): avc: denied { signull } for pid=17318 comm="opendkim" scontext=unconfined_u:system_r:dkim_milter_t:s0 tcontext=unconfined_u:system_r:dkim_milter_t:s0 tclass=process type=SYSCALL msg=audit(1390189131.016:48625): arch=40000003 syscall=270 success=no exit=-13 a0=43a6 a1=43ad a2=0 a3=b5800758 items=0 ppid=1 pid=17318 auid=500 uid=497 gid=497 euid=497 suid=497 fsuid=497 egid=497 sgid=497 fsgid=497 tty=(none) ses=4301 comm="opendkim" exe="/usr/sbin/opendkim" subj=unconfined_u:system_r:dkim_milter_t:s0 key=(null) I added fixes. selinux-policy-3.12.1-74.18.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/selinux-policy-3.12.1-74.18.fc19 Package selinux-policy-3.12.1-74.18.fc19: * should fix your issue, * was pushed to the Fedora 19 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.12.1-74.18.fc19' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-2409/selinux-policy-3.12.1-74.18.fc19 then log in and leave karma (feedback). selinux-policy-3.12.1-74.18.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report. This is a year old, and I'm assuming it's fixed, since there's been no more chatter. Commenting here just to clear my needinfo = ? flag. It's not fixed on EL6, but it may be fixed in Fedora. Thanks, Matt. Since EOL for EL6 is still a ways out, do you think it's worth trying to nudge the SELinux guys into taking another crack at it (and I'm assuming it's no bueno for EL5, as well)? |