Crontabs must be owned by root or the crontab creator.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Part of GEN003040

Associated with IA controls: DCSL-1

Associated with: CCI-000225

SV-27333r1_rule Crontabs must be owned by root or the crontab creator.

Vulnerability discussion

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

Check content

List all crontabs on the system. # ls -lL /var/spool/cron/crontabs/ If any crontab is not owned by root or the creating user, this is a finding.

Fix text

Change the crontab owner to root or the crontab creator. # chown root

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