STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

RHEL 8 operating systems booted with a BIOS must require authentication upon booting into single-user and maintenance modes.

DISA Rule

SV-230235r627750_rule

Vulnerability Number

V-230235

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

RHEL-08-010150

Severity

CAT I

CCI(s)

• CCI-000213 - The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Weight

10

Fix Recommendation

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

Check Contents

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.

Vulnerability Number

V-230235

Documentable

False

Rule Version

RHEL-08-010150

Severity Override Guidance

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.

Check Content Reference

M

Target Key

2921

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