The system boot loader configuration file(s) must have mode 0600 or less permissive.

From Red Hat Enterprise Linux 6 Security Technical Implementation Guide

Associated with: CCI-000366

SV-50384r4_rule The system boot loader configuration file(s) must have mode 0600 or less permissive.

Vulnerability discussion

Proper permissions ensure that only the root user can modify important boot parameters.

Check content

To check the permissions of "/boot/grub/grub.conf", run the command: $ sudo ls -lL /boot/grub/grub.conf If the system uses UEFI check the permissions of “/boot/efi/EFI/redhat/grub.conf” file: $ sudo ls –lL /boot/efi/EFI/redhat/grub.conf If properly configured, the output should indicate the following permissions: "-rw-------" If it does not, this is a finding.

Fix text

File permissions for "/boot/grub/grub.conf" and “/boot/efi/EFI/redhat/grub.conf” should be set to 600, which is the default. To properly set the permissions of "/boot/grub/grub.conf", run the command: $ chmod 600 /boot/grub/grub.conf To properly set the permissions of “/boot/efi/EFI/redhat/grub.conf”, run the command: $ chmod 600 /boot/efi/EFI/redhat/grub.conf Boot partitions based on VFAT, NTFS, or other non-standard configurations may require alternative measures.

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