The ftpusers file must not have an extended ACL.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-38812r1_rule The ftpusers file must not have an extended ACL.

Vulnerability discussion

Excessive permissions on the ftpusers file could permit unauthorized modification. Unauthorized modification could result in Denial of Service to authorized FTP users or permit unauthorized users to access the FTP service.

Check content

Check the permissions of the /etc/ftpusers file. #aclget /etc/ftpusers Check if extended permissions are disabled. If extended permissions are not disabled, this is a finding.

Fix text

Remove the extended ACL from the ftpusers file and disable extended permissions. #acledit /etc/ftpusers

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