The ESXi host Secure Shell (SSH) daemon must perform strict mode checking of home directory configuration files.

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-256389SRG-OS-000480-VMM-002000ESXI-70-000020SV-256389r959010_rule2025-02-111
Description
If other users have access to modify user-specific SSH configuration files, they may be able to log on the system as another user.
ℹ️ Check
From an ESXi shell, run the following command: # /usr/lib/vmware/openssh/bin/sshd -T|grep strictmodes Expected result: strictmodes yes If the output does not match the expected result, this is a finding.
✔️ Fix
From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config": StrictModes yes