V-282613

Discussion

Setting the SELinux policy to "targeted" or a more specialized policy ensures the system will confine processes that are likely to be targeted for exploitation, such as network or system services. Note: During the development or debugging of SELinux modules, it is common to temporarily place nonproduction systems in "permissive" mode. In such temporary cases, SELinux policies should be developed, and once work is completed, the system should be reconfigured to "targeted".

Check Content

Note: At lower classification levels (CUI, Secret) where vast amounts of data are processed and a performance impact is occurring, an authorizing official can consider this requirement not applicable.

Check that TOSS verifies correct operation of all security functions.

Determine if "SELinux" is active and is enforcing the targeted policy using the following command:

$ sudo sestatus

SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Memory protection checking: actual (secure)
Max kernel policy version: 33

If the "Loaded policy name" is not set to "targeted", this is a finding.

Verify the "/etc/selinux/config" file is configured with the "SELINUXTYPE" of "targeted":

$ sudo grep -i "selinuxtype" /etc/selinux/config | grep -v '^#'
SELINUXTYPE = targeted

If no results are returned, or "SELINUXTYPE" is not set to "targeted", this is a finding.