NAME

     mac_stub — MAC policy stub module

SYNOPSIS

     To compile the stub policy into your kernel, place the following lines in your kernel
     configuration file:

           options MAC
           options MAC_STUB

     Alternately, to load the stub module at boot time, place the following line in your kernel
     configuration file:

           options MAC

     and in loader.conf(5):

           mac_stub_load="YES"

DESCRIPTION

     The mac_stub policy module implements a stub MAC policy that has no effect on access control
     in the system.  Unlike mac_none(4), each MAC entry point is defined as a “no-op”, so the
     policy module will be entered for each event, but no change in system behavior should
     result.

   Label Format
     No labels are defined for mac_stub.

SEE ALSO

     mac(4), mac_biba(4), mac_bsdextended(4), mac_ifoff(4), mac_lomac(4), mac_mls(4),
     mac_none(4), mac_partition(4), mac_portacl(4), mac_seeotheruids(4), mac_test(4), mac(9)

HISTORY

     The mac_stub policy module first appeared in FreeBSD 5.1 and was developed by the TrustedBSD
     Project.

AUTHORS

     This software was contributed to the FreeBSD Project by Network Associates Labs, the
     Security Research Division of Network Associates Inc.  under DARPA/SPAWAR contract
     N66001-01-C-8035 (“CBOSS”), as part of the DARPA CHATS research program.

BUGS

     While the MAC Framework design is intended to support the containment of the root user, not
     all attack channels are currently protected by entry point checks.  As such, MAC Framework
     policies should not be relied on, in isolation, to protect against a malicious privileged
     user.