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RHEL-08-010520 - The RHEL 8 SSH daemon must not allow authentication using known host's authentication.
Information
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.Solution
Configure the SSH daemon to not allow authentication using known host's authentication.Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes":
IgnoreUserKnownHosts yes
The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command:
$ sudo systemctl restart sshd.service
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_8_V2R7_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 8 STIG v2r7
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-230290r1069302_rule, STIG-ID|RHEL-08-010520, Vuln-ID|V-230290
Plugin: Unix
Control ID: 002a096923fde1bdd72a6f499454b9979b605a16f26ef8c34be2ffaf403fd33a