The SSH daemon LoginGraceTime must be set correctly.

From Apple OS X 10.9 (Mavericks) Workstation Security Technical Implementation Guide

Associated with: CCI-001133

SV-72817r1_rule The SSH daemon LoginGraceTime must be set correctly.

Vulnerability discussion

SSH should be configured to log users out after a 15 minute interval of inactivity and to only wait 30 seconds before timing out login attempts. Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session or an incomplete login attempt will also free up resources committed by the managed network element.

Check content

The SSH daemon LoginGraceTime must be set correctly. To check the amount of time that a user can login through SSH, run the following command: sudo grep ^LoginGraceTime /etc/sshd_config If the value is not set to '30' or less, this is a finding.

Fix text

In order to make sure that LoginGraceTime is configured correctly, run the following command: sudo sed -i.bak 's/.*LoginGraceTime.*/LoginGraceTime 30/' /etc/sshd_config

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