Finding ID | Version | Rule ID | IA Controls | Severity |
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V-230235 | RHEL-08-010150 | SV-230235r599732_rule | High |
Description |
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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 RHEL 8 and is designed to require a password to boot into single-user mode or make modifications to the boot menu. |
STIG | Date |
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Red Hat Enterprise Linux 8 Security Technical Implementation Guide | 2020-11-25 |
Check Text ( C-32904r567451_chk ) |
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For systems that use UEFI, this is Not Applicable. Check to see if an encrypted root password is set. On systems that use a BIOS, use the following command: $ sudo grep -iw grub2_password /boot/grub2/user.cfg GRUB2_PASSWORD=grub.pbkdf2.sha512.[password_hash] If the root password does not begin with "grub.pbkdf2.sha512", this is a finding. Verify that a unique name is set as the "superusers": $ sudo grep -iw "superusers" /boot/grub2/grub.cfg set superusers="[someuniquestringhere]" export superusers If "superusers" is not set to a unique name or is missing a name, this is a finding. |
Fix Text (F-32879r567452_fix) |
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Configure the system to require a grub bootloader password for the grub superuser account. Generate an encrypted grub2 password for the grub superuser account with the following command: $ sudo grub2-setpassword Enter password: Confirm password: Edit the /boot/grub2/grub.cfg file and add or modify the following lines in the "### BEGIN /etc/grub.d/01_users ###" section: set superusers="[someuniquestringhere]" export superusers |