The SSH daemon must not allow rhosts RSA authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22487	GEN005538	SV-64081r1_rule		Medium

Description
If SSH permits rhosts RSA authentication, a user may be able to log in based on the keys of the host originating the request and not any user-specific authentication.

STIG	Date
Oracle Linux 5 Security Technical Implementation Guide	2020-02-25

Details

Check Text ( C-52497r2_chk )
Check the SSH daemon configuration for the RhostsRSAAuthentication setting. # grep -i RhostsRSAAuthentication /etc/ssh/sshd_config | grep -v '^#' If the setting is set to "yes", this is a finding.

Fix Text (F-54611r2_fix)
Edit the SSH daemon configuration and add or edit the "RhostsRSAAuthentication" setting value to "no". Restart the SSH daemon. # /sbin/service sshd restart