Detections
Analytics
PHTN-30-000087 - The Photon operating system must configure sshd to ignore user-specific 'known_host' files.
Information
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.Solution
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
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_7-0_Y25M01_STIG.zip
Item Details
Audit Name: DISA STIG VMware vSphere 7.0 Photon OS v1r4
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-256556r991589_rule, STIG-ID|PHTN-30-000087, Vuln-ID|V-256556
Plugin: Unix
Control ID: 038d459aa04e75fad4535e744bf1cd85ac97d73094747027001d0e13ab310cde