GEN003100 - Cron and crontab directories must have mode 0755 or less permissive.

Information

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

Solution

Change the mode of the crontab directory.
# chmod 0755 /var/spool/cron/crontabs

See Also

http://iasecontent.disa.mil/stigs/zip/U_STIG_Library_2015_07.zip