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Bug 1426824 - Current selinux policy break nagios
Summary: Current selinux policy break nagios
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.3
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-02-25 10:52 UTC by M. Scherer
Modified: 2018-06-15 03:56 UTC (History)
9 users (show)

Fixed In Version: selinux-policy-3.13.1-175.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-04-10 12:26:56 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:0763 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2018-04-10 12:08:10 UTC

Description M. Scherer 2017-02-25 10:52:03 UTC 
Description of problem:
So I did a reboot of our infra for the latest kernel problem, and found out that selinux did prevent nagios from working, with AVC like this:

type=AVC msg=audit(1488019552.522:990): avc:  denied  { read } for  pid=14353 comm="status.cgi" name="objects.cache" dev="xvda1" ino=918300 scontext=system_u:system_r:nagios_script_t:s0 tcontext=system_u:object_r:nagios_spool_t:s0 tclass=file
type=AVC msg=audit(1488019552.522:990): avc:  denied  { open } for  pid=14353 comm="status.cgi" path="/var/spool/nagios/objects.cache" dev="xvda1" ino=918300 scontext=system_u:system_r:nagios_script_t:s0 tcontext=system_u:object_r:nagios_spool_t:s0 tclass=file
type=AVC msg=audit(1488019552.522:991): avc:  denied  { getattr } for  pid=14353 comm="status.cgi" path="/var/spool/nagios/objects.cache" dev="xvda1" ino=918300 scontext=system_u:system_r:nagios_script_t:s0 tcontext=system_u:object_r:nagios_spool_t:s0 tclass=file

So adding this line would be helpful.

allow nagios_script_t nagios_spool_t:file { getattr open read };


Version-Release number of selected component (if applicable):
selinux-policy-3.13.1-102.el7_3.13.noarch

How reproducible:
each time

Steps to Reproduce:
1. install nagios (I have ansible playbook if needed)
2. connect on the web interface with selinux in enforcing


Actual results:
nagios say he can't read anything, and the web interface do not work. It show 1 page, but you can't see anything and can't interact, acknowledge alerts, etc. 

Expected results:
nagios work as expected.

Additional info:
nagios was upgraded in epel in version 4.2. 

maybe it would be useful to move selinux-contrib to EPEL in order to be able to get the policy in sync with the release of epel packages (rather than wait on RHEL release).
Comment 2 Ian Young 2017-02-27 11:09:49 UTC 
Same issue. Perhaps worth adding that this seems to be because the upgrade moved some of the files around, thus giving them different labels:

# find / -name objects.cache -exec ls -lZ \{\} \;
-rw-r--r--. nagios nagios system_u:object_r:nagios_log_t:s0 /var/log/nagios/objects.cache
-rw-r--r--. nagios nagios system_u:object_r:nagios_spool_t:s0 /var/spool/nagios/objects.cache
Comment 10 errata-xmlrpc 2018-04-10 12:26:56 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0763
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