Default system accounts (with the exception of root) must not be listed in the cron.allow file or must be included in the cron.deny file, if cron.allow does not exist.

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Associated with IA controls: ECPA-1

Associated with: CCI-000225

SV-27338r1_rule Default system accounts (with the exception of root) must not be listed in the cron.allow file or must be included in the cron.deny file, if cron.allow does not exist.

Vulnerability discussion

To centralize the management of privileged account crontabs, of the default system accounts, only root may have a crontab.

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Fix text

Remove default system accounts (such as bin, sys, adm, or others, traditionally UID less than 500) from the cron.allow file if it exists, or add those accounts to the cron.deny file.

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