[Bug 2011628] [NEW] Apparmor Disallows Disabling Dhclient Scripts

[Brett Holman]

Public bug reported:

In some cases, it may be desirable to disable dhclient scripts. By
default /sbin/dhclient-script is used, and some others are allowed by
the apparmor profile.

Without Apparmor, disabling hook scripts can be accomplished with flags
-sf /bin/true, but with apparmor enabled this gets blocked:

execve (/bin/true, ...): Permission denied

Unfortunately dhclient doesn't appear to provide any other mechanism for
disabling hook scripts.

** Affects: isc-dhcp (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2011628

Title:
  Apparmor Disallows Disabling Dhclient Scripts

Status in isc-dhcp package in Ubuntu:
  New

Bug description:
  In some cases, it may be desirable to disable dhclient scripts. By
  default /sbin/dhclient-script is used, and some others are allowed by
  the apparmor profile.

  Without Apparmor, disabling hook scripts can be accomplished with
  flags -sf /bin/true, but with apparmor enabled this gets blocked:

  execve (/bin/true, ...): Permission denied

  Unfortunately dhclient doesn't appear to provide any other mechanism
  for disabling hook scripts.

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