mac_seeotheruids(4)

NAME

mac_seeotheruids - simple policy controlling whether users

see other
users

SYNOPSIS

To  compile the policy into your kernel, place the following
lines in your
kernel configuration file:
      options MAC
      options MAC_SEEOTHERUIDS
Alternately, to load the module at boot time, place the following line in
your kernel configuration file:
      options MAC
and in loader.conf(5):
      mac_seeotheruids_load="YES"

DESCRIPTION

The mac_seeotheruids policy module, when enabled, denies

users to see
processes or sockets owned by other users.

To enable mac_seeotheruids, set the sysctl OID security.mac.seeotheruids.enabled to 1.

To allow users to see processes and sockets owned by the

same primary
group, set the sysctl OID

security.mac.seeotheruids.primarygroup_enabled to 1.

To allow processes with a specific group ID to be exempt

from the policy,
set the sysctl OID

security.mac.seeotheruids.specificgid_enabled to 1, and security.mac.seeotheruids.specificgid to the group ID to

be exempted.

Label Format

No labels are defined for mac_seeotheruids.

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_test(4),
mac(9)

HISTORY

The mac_seeotheruids policy module first appeared in FreeBSD

5.0 and was
developed by the TrustedBSD Project.

AUTHORS

This software was contributed to the FreeBSD Project by Net

work Associates Labs, the Security Research Division of Network Associ

ates Inc.
under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as

part of the
DARPA CHATS research program.

BUGS

See mac(9) concerning appropriateness for production use.

The TrustedBSD
MAC Framework is considered experimental in FreeBSD.

While the MAC Framework design is intended to support the

containment of
the root user, not all attack channels are currently pro

tected by entry
point checks. As such, MAC Framework policies should not be

relied on,
in isolation, to protect against a malicious privileged us

er.

BSD December 8, 2002

BSD