Crontab files must not have extended ACLs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22386	GEN003090	SV-45601r1_rule		Medium

Description
To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured. ACLs on crontab files may provide unauthorized access to the files.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-42967r1_chk )
Check the permissions of the crontab files. Procedure: # ls -lL /var/spool/cron /var/spool/cron/tabs ls –lL /etc/crontab /etc/cron.{d,daily,hourly,monthly,weekly} or # ls -lL /etc/cron*|grep -v deny If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix Text (F-38999r1_fix)
Remove the extended ACL from the file. # setfacl --remove-all [crontab file]