AlmaLinux OS 9 must not allow a noncertificate trusted host SSH logon to the system.

An XCCDF Rule

Details
Profiles

Description

SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.

ID: SV-269264r1050146_rule
Version: ALMA-09-020810
Severity: Medium
References: CCI-000366
Updated: about 2 months ago

Remediation Templates

Configure the AlmaLinux OS 9 SSH daemon to not allow a noncertificate trusted host SSH logon to the system with the following command:

Add the following line to "/etc/ssh/sshd_config", or uncomment the line and set the value to "no":

HostbasedAuthentication no
Alternatively, add the setting to an include file if the line "Include /etc/ssh/sshd_config.d/*.conf" is found at the top of the "/etc/ssh/sshd_config" file:

$ echo 'HostbasedAuthentication no' > /etc/ssh/sshd_config.d/40-hostbasedauthentication.conf

Restart the SSH daemon for the settings to take effect:

$ systemctl restart sshd.service

AlmaLinux OS 9 must not allow a noncertificate trusted host SSH logon to the system.

Description

Remediation Templates

A Manual Procedure