The SSH daemon must restrict login ability to specific users and/or groups.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-26763r1_rule The SSH daemon must restrict login ability to specific users and/or groups.

Vulnerability discussion

Restricting SSH logins to a limited group of users, such as system administrators, prevents password-guessing and other SSH attacks from reaching system accounts and other accounts not authorized for SSH access.

Check content

Check the SSH daemon configuration for the AllowGroups setting. # grep -i AllowGroups /etc/ssh/sshd_config | grep -v '^#' If no lines are returned, this is a finding.

Fix text

Edit the SSH daemon configuration and add an AllowGroups directive.

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