The SSH daemon must not allow authentication using RSA rhosts authentication.

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The SSH daemon must not allow authentication using RSA rhosts authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-72239	RHEL-07-040330	SV-86863r3_rule		Medium

Description
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.

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2017-07-08

Details

Check Text ( C-72473r4_chk )
Verify the SSH daemon does not allow authentication using RSA rhosts authentication. To determine how the SSH daemon's "RhostsRSAAuthentication" option is set, run the following command: # grep RhostsRSAAuthentication /etc/ssh/sshd_config RhostsRSAAuthentication no If the value is returned as "yes", the returned line is commented out, or no output is returned, this is a finding.

Fix Text (F-78593r4_fix)
Configure the SSH daemon to not allow authentication using RSA rhosts authentication. Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": RhostsRSAAuthentication no The SSH service must be restarted for changes to take effect.