Vulnerability 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

Verify Amazon Linux 2023 SELINUX is using the targeted policy with the following command:

$ sestatus | grep policy
Loaded policy name: targeted

If the loaded policy name is not "targeted", this is a finding.

Fix

Configure Amazon Linux 2023 to use the targeted SELINUX policy.

Edit the file "/etc/selinux/config" and add or modify the following line:

SELINUXTYPE=targeted

A reboot is required for the changes to take effect.