All rights reserved.
This software was developed for the FreeBSD Project by Chris Costello
at Safeport Network Services and Network Associates Laboratories, 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.
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$FreeBSD$
.Dd October 6, 2005 .Dt MAC_SEEOTHERUIDS 4 .Os .Sh NAME .Nm mac_seeotheruids .Nd "simple policy controlling whether users see other users" .Sh SYNOPSIS To compile the policy into your kernel, place the following lines in your kernel configuration file: d -ragged -offset indent .Cd "options MAC" .Cd "options MAC_SEEOTHERUIDS" .Ed
p Alternately, to load the module at boot time, place the following line in your kernel configuration file: d -ragged -offset indent .Cd "options MAC" .Ed
p and in .Xr loader.conf 5 : d -literal -offset indent mac_seeotheruids_load="YES" .Ed .Sh DESCRIPTION The .Nm policy module, when enabled, denies users to see processes or sockets owned by other users.
p To enable .Nm , set the sysctl OID .Va security.mac.seeotheruids.enabled to 1. To permit superuser awareness of other credentials by virtue of privilege, set the sysctl OID .Va security.mac.seeotheruids.suser_privileged to 1.
p To allow users to see processes and sockets owned by the same primary group, set the sysctl OID .Va security.mac.seeotheruids.primarygroup_enabled to 1.
p To allow processes with a specific group ID to be exempt from the policy, set the sysctl OID .Va security.mac.seeotheruids.specificgid_enabled to 1, and .Va security.mac.seeotheruids.specificgid to the group ID to be exempted. .Ss Label Format No labels are defined for .Nm . .Sh SEE ALSO .Xr mac 4 , .Xr mac_biba 4 , .Xr mac_bsdextended 4 , .Xr mac_ifoff 4 , .Xr mac_lomac 4 , .Xr mac_mls 4 , .Xr mac_none 4 , .Xr mac_partition 4 , .Xr mac_portacl 4 , .Xr mac_test 4 , .Xr mac 9 .Sh HISTORY The .Nm policy module first appeared in .Fx 5.0 and was developed by the .Tn TrustedBSD Project. .Sh AUTHORS This software was contributed to the .Fx Project by Network Associates Labs, the Security Research Division of Network Associates Inc. under DARPA/SPAWAR contract N66001-01-C-8035
q Dq CBOSS , as part of the DARPA CHATS research program. .Sh BUGS See .Xr mac 9 concerning appropriateness for production use. The .Tn TrustedBSD MAC Framework is considered experimental in .Fx .
p 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.