Cron and crontab directories must not have extended ACLs.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-39103r1_rule Cron and crontab directories must not have extended ACLs.

Vulnerability discussion

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.

Check content

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

Remove the extended ACL from the crontab file(s) and disable extended permissions. #acledit /

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