STIGQter: STIG Summary: Oracle Linux 9 Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

OL 9 must require a unique superuser's name upon booting into single-user and maintenance modes.

DISA Rule

SV-271451r1137691_rule

Vulnerability Number

V-271451

Group Title

SRG-OS-000080-GPOS-00048

Rule Version

OL09-00-000050

Severity

CAT I

CCI(s)

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

Weight

10

Fix Recommendation

Configure OL 9 to have a unique username for the grub superuser account.

Edit the "/etc/grub.d/01_users" file and add or modify the following lines in the "### BEGIN /etc/grub.d/01_users ###" section:

set superusers="superusers-account"
export superusers

Once the superuser account has been added, update the grub.cfg file by running:

$ sudo grubby --update-kernel=ALL'

Check Contents

Verify that OL 9 requires a unique username for the grub superuser account.

Verify the boot loader superuser account has been set with the following command:

$ sudo grep -A1 "superusers" /etc/grub2.cfg
set superusers="<superusers-account>"
export superusers
password_pbkdf2 root ${GRUB2_PASSWORD}

The <superusers-account> is the actual account name different from common names like root, admin, or administrator.

If superusers contains easily guessable usernames, this is a finding.

Vulnerability Number

V-271451

Documentable

False

Rule Version

OL09-00-000050

Severity Override Guidance

Verify that OL 9 requires a unique username for the grub superuser account.

Verify the boot loader superuser account has been set with the following command:

$ sudo grep -A1 "superusers" /etc/grub2.cfg
set superusers="<superusers-account>"
export superusers
password_pbkdf2 root ${GRUB2_PASSWORD}

The <superusers-account> is the actual account name different from common names like root, admin, or administrator.

If superusers contains easily guessable usernames, this is a finding.

Check Content Reference

M

Target Key

5680