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

RHEL 8 must prevent the loading of a new kernel for later execution.

DISA Rule

SV-230266r627750_rule

Vulnerability Number

V-230266

Group Title

SRG-OS-000366-GPOS-00153

Rule Version

RHEL-08-010372

Severity

CAT II

CCI(s)

• CCI-001749 - The information system prevents the installation of organization-defined software components without verification the software component has been digitally signed using a certificate that is recognized and approved by the organization.

Weight

10

Fix Recommendation

Configure the operating system to disable kernel image loading.

Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory:

kernel.kexec_load_disabled = 1

Load settings from all system configuration files with the following command:

$ sudo sysctl --system

Check Contents

Verify the operating system is configured to disable kernel image loading with the following commands:

Check the status of the kernel.kexec_load_disabled kernel parameter

$ sudo sysctl kernel.kexec_load_disabled

kernel.kexec_load_disabled = 1

If "kernel.kexec_load_disabled" is not set to "1" or is missing, this is a finding.

Check that the configuration files are present to enable this kernel parameter

$ sudo grep -r kernel.kexec_load_disabled /etc/sysctl.conf /etc/sysctl.d/*.conf

/etc/sysctl.d/99-sysctl.conf:kernel.kexec_load_disabled = 1

If "kernel.kexec_load_disabled" is not set to "1", is missing or commented out, this is a finding.

Vulnerability Number

V-230266

Documentable

False

Rule Version

RHEL-08-010372

Severity Override Guidance

Verify the operating system is configured to disable kernel image loading with the following commands:

Check the status of the kernel.kexec_load_disabled kernel parameter

$ sudo sysctl kernel.kexec_load_disabled

kernel.kexec_load_disabled = 1

If "kernel.kexec_load_disabled" is not set to "1" or is missing, this is a finding.

Check that the configuration files are present to enable this kernel parameter

$ sudo grep -r kernel.kexec_load_disabled /etc/sysctl.conf /etc/sysctl.d/*.conf

/etc/sysctl.d/99-sysctl.conf:kernel.kexec_load_disabled = 1

If "kernel.kexec_load_disabled" is not set to "1", is missing or commented out, this is a finding.

Check Content Reference

M

Target Key

2921

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