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RHEL-09-431010 RHEL 9 must use a Linux Security Module configured to enforce limits on system services.

DISA STIG library V2R10
All changes in this version
first version loaded CAT I

Maps to SC-3, SI-6 via CCI-001084, CCI-002696

Title

RHEL 9 must use a Linux Security Module configured to enforce limits on system services.

Control

Ensure that RHEL 9 verifies correct operation of security functions through the use of SELinux with the following command: $ getenforce Enforcing If SELINUX is not set to "Enforcing", this is a finding. Verify that SELinux is configured to be enforcing at boot. grep "SELINUX=" /etc/selinux/config # SELINUX= can take one of these three values: # NOTE: In earlier Fedora kernel builds, SELINUX=disabled would also SELINUX=enforcing If SELINUX line is missing, commented out, or not set to "enforcing", this is a finding.

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. Satisfies: SRG-OS-000445-GPOS-00199, SRG-OS-000134-GPOS-00068

Related controls

CCI-001084, CCI-002696

Fix

Configure RHEL 9 to verify correct operation of security functions. Edit the file "/etc/selinux/config" and add or modify the following line: SELINUX=enforcing A reboot is required for the changes to take effect.