Cron and crontab directories must not have extended ACLs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22387	GEN003110	SV-39103r1_rule	ECLP-1	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 cron and crontab directories may provide unauthorized access to these directories. Unauthorized modifications to these directories or their contents may result in the addition of unauthorized cron jobs or deny service to authorized cron jobs.

STIG	Date
AIX 5.3 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2014-10-03

Details

Check Text ( C-38094r1_chk )
Check the permissions of the crontab directories. # ls -lL /var/spool/cron/crontabs # aclget < crontab > # aclget /var/spool/cron Check if extended permissions are disabled. If extended permissions are not disabled, this is a finding.

Fix Text (F-33356r1_fix)
Remove the extended ACL from the crontab file(s) and disable extended permissions. #acledit /