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

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
high	V-261330	SRG-OS-000480-GPOS-00229	SLEM-05-255025	SV-261330r996457_rule	2024-06-04	1

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

ℹ️ Check
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.

ℹ️ Check

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
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