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V-204435

CAT II (Medium)

The Red Hat Enterprise Linux operating system must not allow a non-certificate trusted host SSH logon to the system.

Rule ID

SV-204435r991591_rule

STIG

Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Version

V3R15

CCIs

CCI-000366

Discussion

Failure to restrict system access to authenticated users negatively impacts operating system security.

Check Content

Verify the operating system does not allow a non-certificate trusted host SSH logon to the system.

Check for the value of the "HostbasedAuthentication" keyword with the following command:

# grep -i hostbasedauthentication /etc/ssh/sshd_config
HostbasedAuthentication no

If the "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out, this is a finding.

Fix Text

Configure the operating system to not allow a non-certificate trusted host SSH logon to the system.

Edit the "/etc/ssh/sshd_config" file to uncomment or add the line for "HostbasedAuthentication" keyword and set the value to "no":

HostbasedAuthentication no

The SSH service must be restarted for changes to take effect.