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The SSH daemon must be configured to use only the SSHv2 protocol.


Overview

Finding ID Version Rule ID IA Controls Severity
V-63191 ESXI-06-000011 SV-77681r1_rule High
Description
SSH protocol version 1 suffers from design flaws that result in security vulnerabilities and should not be used.
STIG Date
VMware vSphere ESXi 6.0 Security Technical Implementation Guide 2019-01-04

Details

Check Text ( C-63925r1_chk )
To verify which SSH protocol version is configured, run the following command:

# grep -i "^Protocol" /etc/ssh/sshd_config

If there is no output or the output is not exactly "Protocol 2", this is a finding.
Fix Text (F-69109r1_fix)
Only SSH protocol version 2 connections should be permitted.

Add or correct the following line in "/etc/ssh/sshd_config":

Protocol 2