Title

The Red Hat Enterprise Linux operating system must enable SELinux. (Cat II impact)

Discussion

Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. This requirement applies to operating systems performing security function verification/testing and/or systems and environments that require this functionality.

Check Content

Per OPORD 16-0080, the preferred endpoint security tool is Endpoint Security for Linux (ENSL) in conjunction with SELinux. Verify the operating system verifies correct operation of all security functions. Check if "SELinux" is active and in "Enforcing" mode with the following command: # getenforce Enforcing If "SELinux" is not active and not in "Enforcing" mode, this is a finding.

Fix Text

Configure the operating system to verify correct operation of all security functions. Set the "SELinux" status and the "Enforcing" mode by modifying the "/etc/selinux/config" file to have the following line: SELINUX=enforcing A reboot is required for the changes to take effect.

Additional Identifiers

Rule ID: SV-204453r853895_rule

Vulnerability ID: V-204453

Group Title: SRG-OS-000445-GPOS-00199

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.