The system must require authentication before allowing modification of the boot devices or menus. Secure the GRUB Menu (Intel).

An XCCDF Rule

Description

<VulnDiscussion>The flexibility that GRUB provides creates a security risk if its configuration is modified by an unauthorized user. The failsafe menu entry needs to be secured in the same environments that require securing the systems firmware to avoid unauthorized removable media boots.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>

ID: SV-216218r603268_rule
Severity: Low
References: CCI-000366
Updated: 9 months ago

The root role is required.

This action applies to the global zone only. Determine the zone that you are currently securing.

# zonename
If the command output is "global", this action applies.

Update GRUB to use a custom configuration file.

# pfedit /rpool/boot/grub/grub.cfg
Insert the line:
source $prefix/custom.cfg

Create a password hash.

# /usr/lib/grub2/bios/bin/grub-mkpasswd-pbkdf2
Enter password: 
Reenter password: 
Your PBKDF2 is .......
Copy the long password hash in its entirety.

# pfedit /rpool/boot/grub/custom.cfg
Insert the lines:
set superusers="[username]"
password_pbkdf2 [username] [password hash]

Restart the system.

The system must require authentication before allowing modification of the boot devices or menus. Secure the GRUB Menu (Intel).

Description

Remediation - Manual Procedure