cis-ubuntu1204-v110-3-1

DevOps & Security

Set User/Group Owner on bootloader config

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.1.0/cis-ubuntu1204-v110-3-1/SKILL.md

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3.1 Set User/Group Owner on bootloader config (Scored)

Profile Applicability

Level 1

Description

Set the owner and group of your boot loaders config file to the root user. These instructions default to GRUB stored at /boot/grub/grub.cfg.

Rationale

Setting the owner and group to root prevents non-root users from changing the file.

Audit Procedure

Using Command Line

Perform the following to determine if the /boot/grub/grub.cfg file has the correct ownership:

stat -c "%u %g" /boot/grub/grub.cfg | egrep "^0 0"

Expected Result

The command should return 0 0 indicating root:root ownership. If the above command emits no output then the system is not configured as recommended.

Remediation

Using Command Line

Run the following to change ownership of /boot/grub/grub.cfg:

chown root:root /boot/grub/grub.cfg

Default Value

By default, /boot/grub/grub.cfg is owned by root:root.

References

CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Scored