Title

The Ubuntu operating system must not allow unattended or automatic login via ssh. (Cat I impact)

Discussion

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

Check Content

Verify that unattended or automatic login via ssh is disabled. Check that unattended or automatic login via ssh is disabled with the following command: # egrep '(Permit(.*?)(Passwords|Environment))' /etc/ssh/sshd_config PermitEmptyPasswords no PermitUserEnvironment no If "PermitEmptyPasswords" or "PermitUserEnvironment" keywords are not set to "no", are missing completely, or they are commented out, this is a finding.

Fix Text

Configure the Ubuntu operating system to allow the SSH daemon to not allow unattended or automatic login to the system. Add or edit the following lines in the "/etc/ssh/sshd_config" file: PermitEmptyPasswords no PermitUserEnvironment no In order for the changes to take effect, the SSH daemon must be restarted. # sudo systemctl restart sshd.service

Additional Identifiers

Rule ID: SV-219314r877377_rule

Vulnerability ID: V-219314

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

Expert Comments

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