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Bug 1110397 - SELinux prevents /usr/sbin/rndc from reading /dev/urandom and /dev/random
Summary: SELinux prevents /usr/sbin/rndc from reading /dev/urandom and /dev/random
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: selinux-policy
Version: 6.5
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
: 1124832 (view as bug list)
Depends On:
Blocks: 1166281
TreeView+ depends on / blocked
 
Reported: 2014-06-17 14:45 UTC by Radek Bíba
Modified: 2014-11-20 17:31 UTC (History)
7 users (show)

Fixed In Version: selinux-policy-3.7.19-245.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1166281 (view as bug list)
Environment:
Last Closed: 2014-10-14 08:02:50 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
raw avc log, as requested (2.72 KB, text/plain)
2014-07-13 19:39 UTC, John Sauter 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2014:1568 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2014-10-14 01:27:37 UTC

Description Radek Bíba 2014-06-17 14:45:35 UTC 
Description of problem:
This is repeating in /var/log/messages on a freshly installed system:

Jun 17 10:29:36 dhcp-8-30-13 dhclient[1666]: DHCPREQUEST on eth0 to 10.10.160.2 port 67 (xid=0x40099b46)
Jun 17 10:29:36 dhcp-8-30-13 dhclient[1666]: DHCPACK from 10.10.160.2 (xid=0x40099b46)
Jun 17 10:29:36 dhcp-8-30-13 dhclient[1666]: bound to 10.8.30.13 -- renewal in 794 seconds.
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info> (eth0): DHCPv4 state changed renew -> renew
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   address 10.8.30.13
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   prefix 19 (255.255.224.0)
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   gateway 10.8.31.254
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   nameserver '10.10.160.2'
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   nameserver '10.11.5.19'
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   nameserver '10.5.30.160'
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   domain name 'XXX'
Jun 17 10:29:36 dhcp-8-30-13 NetworkManager[1645]: <info>   NIS domain 'redhat.com'
Jun 17 10:29:39 dhcp-8-30-13 setroubleshoot: SELinux is preventing /usr/sbin/rndc from read access on the chr_file urandom. For complete SELinux messages. run sealert -l ddf7365e-a610-4a05-b75e-2ca00eb51c61
Jun 17 10:29:39 dhcp-8-30-13 setroubleshoot: SELinux is preventing /usr/sbin/rndc from read access on the chr_file random. For complete SELinux messages. run sealert -l 52fb2f55-58bf-4fbf-a86b-42ba101473d0

Version-Release number of selected component (if applicable):
selinux-policy-3.7.19-231.el6_5.3.noarch
bind-9.8.2-0.23.rc1.el6_5.1.x86_64

Additional info:
Workaround: setsebool -P global_ssp on.
Comment 1 Miroslav Grepl 2014-06-24 15:24:20 UTC 
Could you attach raw AVC msgs?
Comment 3 John Sauter 2014-07-13 19:39:37 UTC 
Created attachment 917640 [details]
raw avc log, as requested

I am not the original poster, but I am seeing the same symptom so I am providing the requested information.  This is on a Fedora 20 X84_64 system.
Comment 5 Daniel Walsh 2014-07-14 12:24:07 UTC 
If a domain is allowed to read random_device_t, there is no reason to block urandom.  I would allow ndc_t access to both devices.
Comment 6 Lukas Vrabec 2014-07-15 09:09:17 UTC 
I did it how Dan suggested.

patch sent.
Comment 10 Miroslav Grepl 2014-07-30 16:10:30 UTC 
*** Bug 1124832 has been marked as a duplicate of this bug. ***
Comment 11 errata-xmlrpc 2014-10-14 08:02:50 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.

http://rhn.redhat.com/errata/RHBA-2014-1568.html
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