Crontab files must be group-owned by root, cron, or the crontab creator's primary group.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22385	GEN003050	SV-37400r1_rule	ECLP-1	Medium

Description
To protect the integrity of scheduled system jobs and prevent malicious modification to these jobs, crontab files must be secured.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2017-03-01

Details

Check Text ( C-36079r1_chk )
Check the group ownership of the crontab files. Procedure: # ls -lL /var/spool/cron # ls -lL /etc/cron.d /etc/crontab /etc/cron.daily /etc/cron.hourly /etc/cron.monthly /etc/cron.weekly or # ls -lL /etc/cron*|grep -v deny If the group owner is not root or the crontab owner's primary group, this is a finding.

Fix Text (F-31323r1_fix)
Change the group owner of the crontab file to root, cron, or the crontab's primary group. Procedure: # chgrp root [crontab file]