NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. NOTE: In RSLinx Classic 4.10 or later, “Accept UDP Messages on Ethernet Port” checkbox is unchecked by default.įor more information please see the Rockwell Automation security advisory found at:
If the “Unsolicited Messages” checkbox is marked, then Port 44818 is being used in the application. Select Topic Configuration and then go to the Data Collection tab in the Topic Configuration pop-up. To check if you are using unsolicited messages, go to the “DDE/OPC” dropdown in RSLinx Classic. Port 44818 is needed only when a user wants to utilize unsolicited messages. Then in the General tab of the Options pop-up, uncheck the option “Accept UDP Messages on Ethernet Port”. To disable Port 44818, go to Options in RSLinx Classic. Rockwell Automation has also stated that users may disable Port 44818 in RSLinx Classic if it is not utilized during system operation. These patches can be found at Knowledgebase Article ID: 1084828 Rockwell Automation has released patches to address earlier versions of RSLinx Classic including v3.60, v3.70, v3.80, v3.81, v3.90, v4.00.01, v4.10. Rockwell Automation (working with Tenable) reported this vulnerability to CISA. COMPANY HEADQUARTERS LOCATION: United States.CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and Wastewater Systems.A CVSS v3 base score of 10.0 has been calculated the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
dll file of RSLinx Classic where the data in a Forward Open service request is passed to a fixed size buffer, allowing an attacker to exploit a stack-based buffer overflow condition.ĬVE-2019-6553 has been assigned to this vulnerability.
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