Anonymous FTP accounts must not have a functional shell.

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Associated with IA controls: ECCD-2, ECCD-1

Associated with: CCI-000225

SV-37549r1_rule Anonymous FTP accounts must not have a functional shell.

Vulnerability discussion

If an anonymous FTP account has been configured to use a functional shell, attackers could gain access to the shell if the account is compromised.

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Configure anonymous FTP accounts to use a non-functional shell. If necessary, edit the /etc/passwd file to remove any functioning shells associated with the ftp account and replace them with non-functioning shells, such as /dev/null.

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