Classification: UNCLASSIFIED
Caveats: NONE
Background info: running RHEL6 with the latest updates, so selinux-policy-targeted-3.7.19-231.el6_5.3.noarch.
When moving from Permissive to Enforcing, two scripts in /etc/cron.daily that use the bash "." operator to include a functions file can no longer do so. The functions file sets $PATH and other environment variables, so subsequent commands in the scripts fail.
Interestingly, when run out of root's crontab, the scripts work just fine. The context when doing that (gathered by placing id -Z in the script) is:
unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
Not sure why; the script itself isn't unlabeled:
bash-4.1# ls -lZ /usr/local/sbin/puppet-state
-rwx------. root root system_u:object_r:bin_t:s0 /usr/local/sbin/puppet-state
When run from /etc/cron.daily (or cron.hourly, where I placed a copy for faster testing), the context is:
system_u:system_r:system_cronjob_t:s0-s0:c0.c1023
bash-4.1# ls -lZ /etc/cron.hourly/puppet-state
-rwx------. root root system_u:object_r:bin_t:s0 /etc/cron.hourly/puppet-state
The exact command in question it's failing to run is:
. /opt/puppet/scripts/functions
Which is labeled thusly:
bash-4.1# ls -lZ /opt/puppet/scripts/functions
-r-x------. root root unconfined_u:object_r:usr_t:s0 /opt/puppet/scripts/functions
In either Enforcing or Permissive, I wasn't seeing anything that looked relevant, so I ran semodule -DB. This is the only thing cron-related, but (and I'm not very experienced with SELinux, so maybe I'm missing something) that doesn't seem like it:
bash-4.1# cat /var/log/audit/audit.log-20140814 | grep cron | audit2allow -w
type=AVC msg=audit(1407915503.212:155119): avc: denied { rlimitinh } for pid=26239 comm="prelink" scontext=system_u:system_r:prelink_cron_system_t:s0-s0:c0.c1023 tcontext=system_u:system_r:prelink_t:s0-s0:c0.c1023 tclass=process
Was caused by:
Missing type enforcement (TE) allow rule.
You can use audit2allow to generate a loadable module to allow this access.
type=AVC msg=audit(1407915503.212:155119): avc: denied { siginh } for pid=26239 comm="prelink" scontext=system_u:system_r:prelink_cron_system_t:s0-s0:c0.c1023 tcontext=system_u:system_r:prelink_t:s0-s0:c0.c1023 tclass=process
Was caused by:
Missing type enforcement (TE) allow rule.
You can use audit2allow to generate a loadable module to allow this access.
I suppose we could run them out of root's crontab, but they're easier to manage in cron.daily, and I'd like to solve the problem. Any assistance is greatly appreciated. A search of the list archives didn't turn up this issue; sorry if I've missed it.
--
Ray Shaw (Contractor, STG)
Army Research Laboratory
Classification: UNCLASSIFIED
Caveats: NONE
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