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The Photon operating system must configure sshd to ignore user-specific known_host files.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-239164 | PHTN-67-000093 | SV-239164r675300_rule | Medium |
| Description |
|---|
| SSH trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly disabled. Individual users can have a local list of trusted remote machines which must also be ignored while disabling host-based authentication generally. |
| STIG | Date |
|---|---|
| VMware vSphere 6.7 Photon OS Security Technical Implementation Guide | 2022-01-03 |
Details
| Check Text ( C-42375r675298_chk ) |
|---|
| At the command line, execute the following command: # sshd -T|&grep -i IgnoreUserKnownHosts Expected result: IgnoreUserKnownHosts yes If the output does not match the expected result, this is a finding. |
| Fix Text (F-42334r675299_fix) |
|---|
| Open /etc/ssh/sshd_config with a text editor. Ensure that the "IgnoreUserKnownHosts" line is uncommented and set to the following: IgnoreUserKnownHosts yes At the command line, execute the following command: # service sshd reload |