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← Back to VMware vSphere 7.0 ESXi Security Technical Implementation Guide

V-256386

CAT II (Medium)

The ESXi host Secure Shell (SSH) daemon must not allow host-based authentication.

Rule ID

SV-256386r959010_rule

STIG

VMware vSphere 7.0 ESXi Security Technical Implementation Guide

Version

V1R4

CCIs

CCI-000366

Discussion

SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts. SSH's cryptographic host-based authentication is more secure than ".rhosts" authentication because hosts are cryptographically authenticated. However, it is not recommended that hosts unilaterally trust one another, even within an organization.

Check Content

From an ESXi shell, run the following command:

# /usr/lib/vmware/openssh/bin/sshd -T|grep hostbasedauthentication

Expected result:

hostbasedauthentication no

If the output does not match the expected result, this is a finding.

Fix Text

From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config":

HostbasedAuthentication no