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MAC_SEEOTHERUIDS(4)	     Kernel Interfaces Manual	     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 permit superuser awareness of
     other  credentials  by  virtue   of   privilege,	set   the   sysctl   OID
     security.mac.seeotheruids.suser_privileged 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 list of group IDs  to  be  ex-
     empted.

   Label Format
     No labels are defined for mac_seeotheruids.

SEE ALSO
     mac(4),  mac_biba(4), mac_bsdextended(4), mac_ddb(4), mac_ifoff(4), mac_lo-
     mac(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 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.

FreeBSD ports 15.quarterly     Februrary 26, 2026	     MAC_SEEOTHERUIDS(4)

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