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The SUSE operating system SSH daemon must be configured to not allow authentication using known hosts authentication.
Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.
SUSE Linux Enterprise Server 15 Security Technical Implementation Guide
Check Text ( C-38195r619290_chk )
Verify the SUSE operating system SSH daemon is configured to not allow authentication using "known hosts" authentication.
To determine how the SSH daemon's "IgnoreUserKnownHosts" option is set, run the following command:
> sudo grep -i IgnoreUserKnownHosts /etc/ssh/sshd_config
If the value is returned as "no", the returned line is commented out, or no output is returned, this is a finding.
Fix Text (F-38158r619291_fix)
Configure the SUSE operating system SSH daemon to not allow authentication using "known hosts" authentication.
Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes":