Crontab files must have mode 0600 or less permissive, and files in cron script directories must have mode 0700 or less permissive.

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-64391r1_rule Crontab files must have mode 0600 or less permissive, and files in cron script directories must have mode 0700 or less permissive.

Vulnerability discussion

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

Check content

Check the mode of the crontab files. # ls -lL /var/spool/cron/ # ls -lL /etc/cron.d/ # ls -lL /etc/crontab If any crontab file has a mode more permissive than 0600, this is a finding.

Fix text

Change the mode of the crontab files. # chmod 0600 /var/spool/cron/* /etc/cron.d/* /etc/crontab

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