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

From VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Associated with: CCI-000068

SV-77681r1_rule The SSH daemon must be configured to use only the SSHv2 protocol.

Vulnerability discussion

SSH protocol version 1 suffers from design flaws that result in security vulnerabilities and should not be used.

Check content

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

Only SSH protocol version 2 connections should be permitted. Add or correct the following line in "/etc/ssh/sshd_config": Protocol 2

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