The SUSE operating system must not allow unattended or automatic logon via SSH.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-235032 | SLES-15-040440 | SV-235032r991591_rule | CCI-000366 | high |
| Description | ||||
| Failure to restrict system access via SSH to authenticated users negatively impacts SUSE operating system security. | ||||
| STIG | Date | |||
| SUSE Linux Enterprise Server 15 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-235032r991591_chk)
Verify the SUSE operating system disables unattended or automatic logon via SSH.
Check that unattended or automatic logon via SSH is disabled with the following command:
> sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iEH '^\s*(permit(.*?)(passwords|environment))'
PermitEmptyPasswords no
PermitUserEnvironment no
If "PermitEmptyPasswords" or "PermitUserEnvironment" keywords are not set to "no", are missing completely, or are commented out, this is a finding.
Fix Text (F-38183r619366_fix)
Configure the SUSE operating system disables unattended or automatic logon via SSH.
Add or edit the following lines in the "/etc/ssh/sshd_config" file:
PermitEmptyPasswords no
PermitUserEnvironment no