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The Photon operating system must configure sshd to disconnect idle Secure Shell (SSH) sessions.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-256514 | PHTN-30-000038 | SV-256514r887216_rule | Medium |
| Description |
|---|
| 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 a console or console port that has been left unattended. |
| STIG | Date |
|---|---|
| VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide | 2023-02-21 |
Details
| Check Text ( C-60189r887214_chk ) |
|---|
| At the command line, run the following command: # sshd -T|&grep -i ClientAliveCountMax Expected result: ClientAliveCountMax 0 If the output does not match the expected result, this is a finding. |
| Fix Text (F-60132r887215_fix) |
|---|
| Navigate to and open: /etc/ssh/sshd_config Ensure the "ClientAliveCountMax" line is uncommented and set to the following: ClientAliveCountMax 0 At the command line, run the following command: # systemctl restart sshd.service |