Ensure access to /etc/cron.yearly is configured

MediumLevel 1Automatedlinux

Description

The /etc/cron.yearly directory contains system cron jobs that run on an annual basis. Files in this directory are edited directly by system administrators rather than through the crontab command. The commands below restrict read, write, and search access to root only, preventing regular users from accessing this directory.

How it is checked

Audit method: Shell command

shell

alt0() { s=$(stat -Lc '%a %u %g' /etc/cron.yearly/ 2>&1) || { echo "step1: $s"; return 1; }; set -- $s; m=$((8#$1)); [ $((m & ~0700)) -eq 0 ] && [ "$2" = 0 ] && [ "$3" = 0 ] || { echo "step1: /etc/cron.yearly/ is mode $1 uid $2 gid $3, want 700 or stricter, uid 0, gid 0"; return 1; }; }; if alt0; then echo compliant; fi

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

- IF - cron is installed on the system: Run the following commands to set ownership and permissions on the /etc/cron.yearly directory: # chown root:root /etc/cron.yearly/ # chmod og-rwx /etc/cron.yearly/

Properties

Operating systems: rocky-9
Tags: cis-convertedlinux
Reference: CIS Rocky Linux 9 Benchmark v3.0.0 - 2.4.1.7

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target linux