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Cause:
Everytime when dhcpd starts.
Consequence:
Ownership of /var/lib/dhcpd/dhcpd.leases file is changed from dhcpd:dhcpd to root:root.
Fix:
Patch was back-ported from Fedora.
Result:
Ownership of /var/lib/dhcpd/dhcpd.leases file is not changed.
Created attachment 865188[details]
DHCP Paranoia Patch
Description of problem:
On ever start, dhcpd reverts ownership of /var/lib/dhcpd/dhcpd.leases to root:root, where it should be dhcpd:dhcpd
This was a bug in Fedora 16, bug 837474
And Fedora 17, bug 866714
Version-Release number of selected component (if applicable):
dhcp-4.1.1-39.P1.el6
How reproducible:
Always
Steps to Reproduce:
1. Restart dhcpd service
2. Check ownership of /var/lib/dhcpd/dhcpd.leases
Actual results:
root:root
Expected results:
dhcpd:dhcpd
Additional info:
I've attached a patch based on the Fedora version.
http://pkgs.fedoraproject.org/cgit/dhcp.git/tree/dhcp-paranoia.patch
The patch includes all the code fixes, but doesn't include the man page updates.
After building and installing, it seemed to test fine except for an AVC denial preventing chown operation. The following rule fixed this issue:
allow dhcpd_t self:capability chown;
Comment 5Alexander Todorov
2014-09-05 14:24:27 UTC
After restart:
# ls -lZ /var/lib/dhcpd/dhcpd.leases
-rw-r--r--. dhcpd dhcpd unconfined_u:object_r:dhcpd_state_t:s0 /var/lib/dhcpd/dhcpd.leases
Tested with dhcp-4.1.1-43.P1.el6.x86_64
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.
http://rhn.redhat.com/errata/RHBA-2014-1406.html