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

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-64379r1_rule Default system accounts (with the exception of root) must not be listed in the at.allow file or must be included in the at.deny file if the at.allow file does not exist.

Vulnerability discussion

Default accounts, such as bin, sys, adm, uucp, daemon, and others, should never have access to the "at" facility. This would create a possible vulnerability open to intruders or malicious users.

Check content

# more /etc/at.allow If default accounts (such as bin, sys, adm, and others) are listed in the at.allow file, this is a finding.

Fix text

Remove the default accounts (such as bin, sys, adm, and others, traditionally UID less than 500) from the at.allow file.

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