The ftpusers file must be owned by root.

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-63009r1_rule The ftpusers file must be owned by root.

Vulnerability discussion

If the file ftpusers is not owned by root, an unauthorized user may modify the file to allow unauthorized accounts to use FTP.

Check content

Check the ownership of the ftpusers file. Procedure: For gssftp: # ls -l /etc/ftpusers For vsftp: # ls -l /etc/vsftpd.ftpusers /etc/vsftpd/ftpusers If the ftpusers file is not owned by root, this is a finding.

Fix text

Change the owner of the ftpusers file to root. For gssftp: # chown root /etc/ftpusers For vsftp: # chown root /etc/vsftpd.ftpusers /etc/vsftpd/ftpusers

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