Title

SLEM 5 must not allow unattended or automatic logon via SSH. (Cat I impact)

Discussion

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

Check Content

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

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

Additional Identifiers

Rule ID: SV-261330r996457_rule

Vulnerability ID: V-261330

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

Expert Comments

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