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Bug 658410 - SELinux denials with Cobbler on RHEL 6
Summary: SELinux denials with Cobbler on RHEL 6
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: selinux-policy
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Karel Srot
URL:
Whiteboard:
Depends On:
Blocks: 658822
TreeView+ depends on / blocked
 
Reported: 2010-11-30 09:41 UTC by Mark Chappell
Modified: 2016-10-13 14:07 UTC (History)
5 users (show)

Fixed In Version: selinux-policy-3.7.19-59.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 658822 (view as bug list)
Environment:
Last Closed: 2011-05-19 11:57:09 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Audit Log from enforcing mode (5.20 KB, text/plain)
2011-04-13 11:35 UTC, Mark Chappell 		no flags Details
Audit Log from permissive mode (9.78 KB, text/plain)
2011-04-13 11:35 UTC, Mark Chappell 		no flags Details
Output from restorecon (7.50 KB, text/plain)
2011-04-13 11:36 UTC, Mark Chappell 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0526 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2011-05-19 09:37:41 UTC

Description Mark Chappell 2010-11-30 09:41:34 UTC 
Using EPEL's version of Cobbler for RHEL6 various pieces of cobbler's functionality seem to be being blocked by the RHEL6 SELinux policy.
It looks like a lot of Dominick Grift's recent work didn't make it into the RHEL6 policy.

I've ended up with the following extra module...


policy_module(rhit-cobbler, 1.0.8)

require {
    type cobblerd_t;
    type tftpd_t;
}

#============= cobblerd_t ==============
  # Not sure if these two are needed - generated by audit2allow
allow cobblerd_t self:capability fsetid;
files_read_var_lib_files(cobblerd_t)
  # Cobbler uses rsync to syncronise distributions between servers and 
  # creates/writes to /etc/rsyncd.conf
rsync_manage_config(cobblerd_t)
  # and runs rsync on the "slave"
corenet_tcp_connect_rsync_port(cobblerd_t)
  # Which are then written into /var/www/cobbler
apache_manage_sys_content(cobblerd_t)
miscfiles_manage_public_files(cobblerd_t)
  # Cobbler links a number of files into /var/lib/tftp which tftp should 
  # be able to serve but end up with a cobbler based context
cobbler_read_lib_files(tftpd_t)
Comment 2 Daniel Walsh 2010-11-30 14:51:54 UTC 
Miroslav back port the cobbler and tftp policy from Rawhide, should cover most of these.
Comment 4 Miroslav Grepl 2010-12-09 16:04:54 UTC 
Fixed in selinux-policy-3.7.19-59.el6
Comment 6 Karel Srot 2011-04-04 09:09:16 UTC 
Hello Mark,
did you have a chance to retest it with selinux-policy-3.7.19-59.el6 (or newer)?
Comment 7 Mark Chappell 2011-04-04 09:21:57 UTC 
Karel,

As far as I can tell the latest policy generally available is 3.7.19-54.el6_0.3, but I could try grabbing one of the more recent ones from brewweb.  I'll try to get our office dev environment back up running and let you know.


Mark
Comment 9 Daniel Walsh 2011-04-04 13:22:50 UTC 
The next preview release of selinux-policy is always available in a yum repository on 

http://people.redhat.com/dwalsh/SELinux/RHEL6
Comment 10 Mark Chappell 2011-04-13 11:35:10 UTC 
Created attachment 491730 [details]
Audit Log from enforcing mode
Comment 11 Mark Chappell 2011-04-13 11:35:36 UTC 
Created attachment 491731 [details]
Audit Log from permissive mode
Comment 12 Mark Chappell 2011-04-13 11:36:36 UTC 
Created attachment 491732 [details]
Output from restorecon
Comment 13 Mark Chappell 2011-04-13 11:41:25 UTC 
I've just tried selinux-policy-targeted-3.7.19-84.el6.noarch

However I'm still seeing failures when SELinux is in enforcing mode.
Comment 14 Mark Chappell 2011-04-13 11:42:21 UTC 
The restorecon output is the output of restorecon after I've run in permissive mode.
Comment 15 Daniel Walsh 2011-04-13 14:41:33 UTC 
Mark Can you make sure everything is labelled correctly Maybe remove /var/lib/tftpboot altogether then install selinux-policy-targeted and reinstall cobbler and tftpboot,  Then check the labeling.  Then run the test.  I see in your avc's some mention of default_t
Comment 16 Mark Chappell 2011-04-18 14:51:09 UTC 
I thought I'd already done a full relabel, apparently not.  

The new policy does indeed seem to be doing the job, thanks all.
Comment 18 Mark Chappell 2011-05-09 12:44:00 UTC 
Bah, more denials....

Looks like apache isn't able to read the cobbler files to serve them.

type=AVC msg=audit(1304352033.736:94269): avc:  denied  { read } for  pid=1747 comm="httpd" name="RHEL-6-U0-Workstation-x86_64" dev=dm-2 ino=11386881 scontext=unconfined_u:system_r:httpd_t:s0 tcontext=system_u:object_r:cobbler_var_lib_t:s0 tclass=dir

# rpm -qa 'cobbler*' 'selinux-policy*'
selinux-policy-3.7.19-84.el6.noarch
selinux-policy-targeted-3.7.19-84.el6.noarch
cobbler-2.0.10-1.el6.noarch
Comment 20 errata-xmlrpc 2011-05-19 11:57:09 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0526.html
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