The Photon operating system must configure sshd to ignore user-specific "known_host" files.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256556 | PHTN-30-000087 | SV-256556r991589_rule | CCI-000366 | medium |
| Description | ||||
| Secure Shell (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 that must also be ignored while disabling host-based authentication generally. | ||||
| STIG | Date | |||
| VMware vSphere 7.0 vCenter Appliance Photon OS Security Technical Implementation Guide | 2024-12-16 | |||
Details
Check Text (C-256556r991589_chk)
At the command line, run 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-60174r887341_fix)
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "IgnoreUserKnownHosts" line is uncommented and set to the following:
IgnoreUserKnownHosts yes
At the command line, run the following command:
# systemctl restart sshd.service