Modicon Controllers and SCADAPack RTU Security Notification

This security notification from Schneider Electric details a critical authentication bypass vulnerability (CVE-2017-6034) in the Modicon Modbus Protocol affecting multiple Modicon controller and SCADAPack RTU product lines. The vulnerability allows attackers to replay commands like run, stop, upload, and download due to cleartext transmission, and the document provides specific remediation steps including firewall configuration, password protection, and disabling unused protocols.