The ftpusers file must be group-owned by bin, sys, or system.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Part of GEN004930

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-39180r1_rule The ftpusers file must be group-owned by bin, sys, or system.

Vulnerability discussion

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

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Fix text

Change the group owner of the ftpusers file. Procedure: # chgrp system /etc/ftpusers

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