VMware vSphere ESXi 6.0 Security Technical Implementation Guide

The VMware vSphere ESXi 6.0 Security Technical Implementation Guide (V1 R5) has 108 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R5

CurrentPublished Fri Jan 25 2019

The SSH daemon must not permit tunnels.

VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Assessment Title

Rule Text

The SSH daemon must not permit tunnels.

Description

Discussion Text

OpenSSH has the ability to create network tunnels (layer-2 and layer-3) over an SSH connection. This function can provide similar convenience to a Virtual Private Network (VPN) with the similar risk of providing a path to circumvent firewalls and network ACLs.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-63219

Rule

SV-77709r1_rule

Severity

medium

Rule Version

ESXI-06-000025

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

To verify the PermitTunnel setting, run the following command: 

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

If there is no output or the output is not exactly "PermitTunnel no", this is a finding.

Implementation Procedure

Fix Text

To set the PermitTunnel setting, add or correct the following line in "/etc/ssh/sshd_config":

PermitTunnel no

STIG check 25 of 108 in the VMware vSphere ESXi 6.0 STIG checklist

← Previous · V-63217The SSH daemon must not accept environment variables from the client.Next · V-63221 →The SSH daemon must set a timeout count on idle sessions.