[DSE-Dev] Bug#739590: selinux-policy-default: ssh & bind9 broken by removal of hotplug script initrc labelling

Devin Carraway devin at debian.org
Thu Feb 20 08:28:43 UTC 2014

Package: selinux-policy-default
Version: 2:2.20140206-1
Severity: important

On a jessie system with refpolicy 2:2.20140206-1, and allow-hotplug
set on the primary network interface, sshd is left running in udev_t,
breaking it thoroughly (and in fact flooding the logs with socket
errors until the machine runs out of disk).  bind9, which also has a hotplug
trigger script, is broken by inability of rndc to access auth keys.

My guess as to why:

Removal of the debian-specific refpolicy patches in rev
853ebfe7118c3984ff2b53f51af6f5758d222cd7 had the effect of returning the
contents of /etc/network/if-{up,down}.d/ from initrc_exec_t to etc_t.  As
a result, on systems with allow-hotplug on their primary network interfaces
the sshd and any other network-using daemons aware of hotplug will be started
from udev rather than init, and with an etc_t startup script the usual domain
transition doesn't happen.

I'll test out restoring the labelling and see if there's more to this.

Years ago, thus was Bug#503941 at least as it impacted bind.

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-updates'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.12-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages selinux-policy-default depends on:
ii  libpam-modules   1.1.8-2
ii  libselinux1      2.2.2-1
ii  libsepol1        2.2-1
ii  policycoreutils  2.2.5-1
ii  python           2.7.5-5
ii  selinux-utils    2.2.2-1

Versions of packages selinux-policy-default recommends:
ii  checkpolicy  2.2-1
ii  setools      3.3.8-3

Versions of packages selinux-policy-default suggests:
pn  logcheck        <none>
pn  syslog-summary  <none>

-- Configuration Files:
/etc/selinux/default/modules/active/file_contexts.local [Errno 13] Permission denied: u'/etc/selinux/default/modules/active/file_contexts.local'

-- debconf-show failed

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