Crontabs must be owned by root or the crontab creator.

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-64401r1_rule Crontabs must be owned by root or the crontab creator.

Vulnerability discussion

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

Check content

List all crontabs on the system. # 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 any crontab is not owned by root or the creating user, this is a finding.

Fix text

Change the crontab owner to root or the crontab creator. # chown root or # chown

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