16.7 The MAC seeotheruids Module

Module name: mac_seeotheruids.ko

Kernel configuration line: options MAC_SEEOTHERUIDS

Boot option: mac_seeotheruids_load="YES"

The mac_seeotheruids(4) module mimics and extends the security.bsd.see_other_uids and security.bsd.see_other_gids sysctl tunables. This option does not require any labels to be set before configuration and can operate transparently with the other modules.

After loading the module, the following sysctl tunables may be used to control the features:

• security.mac.seeotheruids.enabled will enable the module's features and use the default settings. These default settings will deny users the ability to view processes and sockets owned by other users.

• security.mac.seeotheruids.specificgid_enabled will allow a certain group to be exempt from this policy. To exempt specific groups from this policy, use the security.mac.seeotheruids.specificgid=XXX sysctl tunable. In the above example, the XXX should be replaced with the numeric group ID to be exempted.

• security.mac.seeotheruids.primarygroup_enabled is used to exempt specific primary groups from this policy. When using this tunable, the security.mac.seeotheruids.specificgid_enabled may not be set.