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V-235032

CAT I (High)

The SUSE operating system must not allow unattended or automatic logon via SSH.

Rule ID

SV-235032r991591_rule

STIG

SUSE Linux Enterprise Server 15 Security Technical Implementation Guide

Version

V2R7

CCIs

None

Discussion

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

Check Content

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

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