OL07-00-010492 - Oracle Linux operating systems version 7.2 or newer booted with United Extensible Firmware Interface (UEFI) must have a unique name for the grub superusers account when booting into single-user mode and maintenance.

Information

If the system does not require valid authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system. GRUB 2 is the default boot loader for Oracle Linux 7 and is designed to require a password to boot into single-user mode or make modifications to the boot menu.

Solution

Configure the system to require a grub bootloader password for the grub superusers account.

Edit the /boot/efi/EFI/redhat/grub.cfg file and add or modify the following lines in the '### BEGIN /etc/grub.d/01_users ###' section:

set superusers='[someuniquestringhere]'
export superusers
password_pbkdf2 [someuniquestringhere] ${GRUB2_PASSWORD}

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Oracle_Linux_7_V2R4_STIG.zip

Item Details

References: CAT|II, CCI|CCI-000213, Rule-ID|SV-244556r744060_rule, STIG-ID|OL07-00-010492, Vuln-ID|V-244556

Plugin: Unix

Control ID: 934b1654fc5585428c98857f0d7632ec2d7d91a9690c3968ec0ac9be2452437c