Lukas,
Failed again last night see the end of this message.
On 5/11/20 9:40 AM, Lukas Vrabec wrote:
On 5/11/20 3:19 PM, Robert Moskowitz wrote:
>
> On 5/11/20 9:04 AM, Lukas Vrabec wrote:
>> On 5/11/20 2:23 PM, Robert Moskowitz wrote:
>>> A little background first.
>>>
>>> This is for Fedora 32 workstation which does not come with a default MTA
>>> and thus there is a slight challenge (ahem) getting CRON's output into
>>> the local mailstore. I don't want to install an MTA (leave why for
>>> Fedora users list discuss) and "procmail -f cron" leaves out a
DATE
>>> header. So I wrote my own little script that I put in /usr/local/mycron
>>> that takes the output from cron and appends the proper content to
>>> /var/spool/mail/$USER.
>>>
>>> Works fine for my personal crontab, but has selinux problems for
>>> logwatch running as root (and probably any other cron task running as
>>> root).
>>>
>>> So I first got told by selinux troubleshooting that I needed:
>>>
>>> ausearch -c 'mycron' --raw | audit2allow -M my-mycron
>>> semodule -X 300 -i my-mycron.pp
>>>
>>> Which I did. Then after this night's run of logwatch, I see that I have
>>> the selinux troubleshoot icon, but when I look, it is empty? So I grep
>>> messages for logwatch, then grep the time it was running and found the
>>> following:
>>>
>>> May 11 03:43:19 lx140e setroubleshoot[121345]: SELinux is preventing
>>> mycron from add_name
>>> access on the directory root. For complete SELinux messages run: sealert
>>> -l 8eb93a73-c7ff-
>>> 42ec-bee1-594d77540808
>>> May 11 03:43:19 lx140e python3[121345]: SELinux is preventing mycron
>>> from add_name access
>>> on the directory root.#012#012***** Plugin catchall (100. confidence)
>>> suggests ********
>>> ******************#012#012If you believe that mycron should be allowed
>>> add_name access on
>>> the root directory by default.#012Then you should report this as a
>>> bug.#012You can generat
>>> e a local policy module to allow this access.#012Do#012allow this access
>>> for now by execut
>>> ing:#012# ausearch -c 'mycron' --raw | audit2allow -M my-mycron#012#
>>> semodule -X 300 -i my
>>> -mycron.pp#012
>>> May 11 03:43:23 lx140e systemd[1]:
>>> dbus-:1.1-org.fedoraproject.Setroubleshootd@15.service:
>>> Succeeded.
>>>
>>> So it looks like now I am told to run:
>>>
>>> ausearch -c 'mycron' --raw | audit2allow -M my-mycron
>>> semodule -X 300 -i my-mycron.pp
>>>
>>> Wait, that is the same I ran earlier? And why did I have to grep
>>> messages to find these?
>>>
>> Hi,
>>
>> Could you please share output of this command:
>>
>> # sealert -l 8eb93a73-c7ff-42ec-bee1-594d77540808
> # sealert -l 8eb93a73-c7ff-42ec-bee1-594d77540808
> Error
> query_alerts error (1003): id (8eb93a73-c7ff-42ec-bee1-594d77540808) not
> found
>
> And from the first selinux alert:
>
> # sealert -l d05d8373-fae7-447e-b45a-74940959809e
> Error
> query_alerts error (1003): id (d05d8373-fae7-447e-b45a-74940959809e) not
> found
>
> I viewed the alerts with the SELinux troubleshooter, but I did NOT tell
> it to delete the alert :(
>
No problem, are you able to reproduce it? If yes, please do and then attach:
# ausearch -m AVC,USER_AVC -ts today
# ausearch -m AVC,USER_AVC -ts today
----
time->Tue May 12 03:22:06 2020
type=AVC msg=audit(1589268126.630:3796): avc: denied { add_name } for
pid=142359 comm="mycron" name="root"
scontext=system_u:system_r:logwatch_t:s0-s0:c0.c1023
tcontext=system_u:object_r:mail_spool_t:s0 tclass=dir permissive=0
May 12 03:22:06 lx140e audit[142359]: AVC avc: denied { add_name }
for pid=142359 comm="mycron" name="root"
scontext=system_u:system_r:logwatch_t:s0-s0:c0.c1023
tcontext=system_u:object_r:mail_spool_t:s0 tclass=dir permissive=0
May 12 03:22:09 lx140e systemd[1]: Started
dbus-:1.1-org.fedoraproject.Setroubleshootd@20.service.
May 12 03:22:09 lx140e audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=dbus-:1.1-org.fedoraproject.Setroubleshootd@20 comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
May 12 03:22:13 lx140e systemd[1]: Started
dbus-:1.1-org.fedoraproject.SetroubleshootPrivileged@10.service.
May 12 03:22:13 lx140e audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=dbus-:1.1-org.fedoraproject.SetroubleshootPrivileged@10
comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=?
terminal=? res=success'
May 12 03:22:19 lx140e setroubleshoot[142374]: SELinux is preventing
mycron from add_name access on the directory root. For complete SELinux
messages run: sealert -l 9fd5890f-400b-4ae0-8a98-43575ac4913a
May 12 03:22:19 lx140e python3[142374]: SELinux is preventing mycron
from add_name access on the directory root.#012#012***** Plugin
catchall (100. confidence) suggests **************************#012#012If
you believe that mycron should be allowed add_name access on the root
directory by default.#012Then you should report this as a bug.#012You
can generate a local policy module to allow this access.#012Do#012allow
this access for now by executing:#012# ausearch -c 'mycron' --raw |
audit2allow -M my-mycron#012# semodule -X 300 -i my-mycron.pp#012
May 12 03:22:23 lx140e systemd[1]:
dbus-:1.1-org.fedoraproject.Setroubleshootd@20.service: Succeeded.
May 12 03:22:23 lx140e audit[1]: SERVICE_STOP pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=dbus-:1.1-org.fedoraproject.Setroubleshootd@20 comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
May 12 03:22:23 lx140e systemd[1]:
dbus-:1.1-org.fedoraproject.Setroubleshootd@20.service: Consumed 3.306s
CPU time.
May 12 03:22:25 lx140e systemd[1]:
dbus-:1.1-org.fedoraproject.SetroubleshootPrivileged@10.service: Succeeded.
May 12 03:22:25 lx140e audit[1]: SERVICE_STOP pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=dbus-:1.1-org.fedoraproject.SetroubleshootPrivileged@10
comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=?
terminal=? res=success'
May 12 03:22:25 lx140e systemd[1]:
dbus-:1.1-org.fedoraproject.SetroubleshootPrivileged@10.service:
Consumed 5.271s CPU time.
# sealert -l 9fd5890f-400b-4ae0-8a98-43575ac4913a
Error
query_alerts error (1003): id (9fd5890f-400b-4ae0-8a98-43575ac4913a) not
found