Title

The Red Hat Enterprise Linux operating system must not allow a non-certificate trusted host SSH logon to the system. (Cat II impact)

Discussion

Failure to restrict system access to authenticated users negatively impacts operating system security.

Check Content

Verify the operating system does not allow a non-certificate trusted host SSH logon to the system. Check for the value of the "HostbasedAuthentication" keyword with the following command: # grep -i hostbasedauthentication /etc/ssh/sshd_config HostbasedAuthentication no If the "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out, this is a finding.

Fix Text

Configure the operating system to not allow a non-certificate trusted host SSH logon to the system. Edit the "/etc/ssh/sshd_config" file to uncomment or add the line for "HostbasedAuthentication" keyword and set the value to "no": HostbasedAuthentication no The SSH service must be restarted for changes to take effect.

Additional Identifiers

Rule ID: SV-204435r877377_rule

Vulnerability ID: V-204435

Group Title: SRG-OS-000480-GPOS-00229

Expert Comments

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