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The Photon operating system must configure sshd to disconnect idle SSH sessions.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-239111 | PHTN-67-000039 | SV-239111r675141_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 the console or console port that has been left unattended. |
| STIG | Date |
|---|---|
| VMware vSphere 6.7 Photon OS Security Technical Implementation Guide | 2022-09-27 |
Details
| Check Text ( C-42322r675139_chk ) |
|---|
| At the command line, execute 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-42281r675140_fix) |
|---|
| Open /etc/ssh/sshd_config with a text editor. Ensure that the "ClientAliveCountMax" line is uncommented and set to the following: ClientAliveCountMax 0 At the command line, execute the following command: # service sshd reload |