UCF STIG Viewer Logo
Changes are coming to https://stigviewer.com. Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey

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


Overview

Finding ID Version Rule ID IA Controls Severity
V-38607 RHEL-06-000227 SV-50408r1_rule High
Description
SSH protocol version 1 suffers from design flaws that result in security vulnerabilities and should not be used.
STIG Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2018-11-28

Details

Check Text ( C-46165r1_chk )
To check which SSH protocol version is allowed, run the following command:

# grep Protocol /etc/ssh/sshd_config

If configured properly, output should be

Protocol 2


If it is not, this is a finding.
Fix Text (F-43555r1_fix)
Only SSH protocol version 2 connections should be permitted. The default setting in "/etc/ssh/sshd_config" is correct, and can be verified by ensuring that the following line appears:

Protocol 2