SLEM 5 must not allow unattended or automatic logon via SSH.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-261330	SLEM-05-255025	SV-261330r996457_rule		High

Description
Failure to restrict system access via SSH to authenticated users negatively impacts SLEM 5 security.

STIG	Date
SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-65059r996456_chk )
Verify SLEM 5 disables unattended or automatic logon via SSH 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))' /etc/ssh/sshd_config:PermitEmptyPasswords no /etc/ssh/sshd_config:PermitUserEnvironment no If "PermitEmptyPasswords" or "PermitUserEnvironment" keywords are not set to "no", are commented out, or are missing completely, this is a finding.

Check Text ( C-65059r996456_chk )

Verify SLEM 5 disables unattended or automatic logon via SSH 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))'
/etc/ssh/sshd_config:PermitEmptyPasswords no
/etc/ssh/sshd_config:PermitUserEnvironment no

If "PermitEmptyPasswords" or "PermitUserEnvironment" keywords are not set to "no", are commented out, or are missing completely, this is a finding.

Fix Text (F-64967r995856_fix)
Configure SLEM 5 disables unattended or automatic logon via SSH. Add or modify the following lines in the "/etc/ssh/sshd_config" file: PermitEmptyPasswords no PermitUserEnvironment no