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ADDING A DEVICE TO RSLINX CLASSIC DRIVERS
ADDING A DEVICE TO RSLINX CLASSIC DRIVER
ADDING A DEVICE TO RSLINX CLASSIC SOFTWARE
ADDING A DEVICE TO RSLINX CLASSIC CODE
ADDING A DEVICE TO RSLINX CLASSIC PLUS

Social engineering is required to convince a user to introduce and load a uniquely crafted CSV file that could cause a buffer overflow that may allow an attacker to crash the application, requiring a restart, or to execute malicious code with the same or higher privileges as the authenticated user. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW Rockwell Automation estimates that the product is used globally.

ADDING A DEVICE TO RSLINX CLASSIC SOFTWARE

According to Rockwell Automation, the software is used across several sectors including Critical Manufacturing, Energy, Water and Wastewater Systems, and others. The affected product, RSLinx Classic, is used to enable communications for a variety of Rockwell Software applications used in industrial control systems. Rockwell Automation, which is a US-based company, provides industrial automation control and information products worldwide across a wide range of industries. ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation. Impact to individual organizations depends on many factors that are unique to each organization. Successful exploitation of this vulnerability could result in the application crashing or allow malicious code injection.

RSLinx Classic, all versions prior to Version 3.73.00.

The following RSLinx Classic versions are affected: Rockwell Automation has produced a new version that mitigates this vulnerability. Ivan Sanchez of WiseSecurity Team has identified a stack-based buffer overflow vulnerability in Rockwell Automation’s OPCTest.exe, which is a test client for RSLinx Classic’s support of the OPC-DA protocol. You may have to wait a minute for the OPC client to catch up, particularly if there are a LOT of points or tags attached.This advisory was originally posted to the US-CERT secure Portal library on April 21, 2015, and is being released to the NCCIC/ICS-CERT web site.

Enable OPC connections in your client (ClearSCADA, etc.).

Open the RSLinx Classic Launch Control Panel and check ‘Always Run As Service’ and then start the RSLinx service using the Start button.

Note: This step is very important or RSLinx will not startup as a service.

Click ‘Done’ and then close the RSLinx Classic App.

This updates the shortcut to reference the proper Driver/device. Once you have selected the proper controller, click ‘Apply’ at the bottom of the screen.

ADDING A DEVICE TO RSLINX CLASSIC DRIVER

Then using the Data Source tree on the right hand side, navigate to the correct driver and controller. To re-link a ‘shortcut’, click on the shortcut.If the driver tree did not expand the shortcut needs to be re-linked. The driver tree on the right should expose the PLC or controller that shortcut is linked to. In the left panel, click on a device/shortcut.

ADDING A DEVICE TO RSLINX CLASSIC DRIVERS

On the right you will see the drivers configured in RSLinx and any devices that are communicating via those drivers.

In the dialogue that opens you will a list on the left, these are the OPC ‘shortcuts’ or OPC ‘devices’.

Click on the DDE/OPC Menu in the toolbar and select Configure OPC Topic Configuration.

If that fails, you might have to restart. If it does not open RSLinx might still be configured to Always Run As a Service, repeat step 2. This allows you to open the RSLinx Classic app and change settings.

Open the RSLinx Launch Control Panel from the start menu.

This is a screenshot of ClearSCADA, showing where you might disable the OPC channel connected to RSLinx. RSLinx attempts to run automatically when clients attempt to connect. This assumes RSLinx is configured to run as a service already. If you come across a SCADA server that is using RSLinx and it is no longer working here are a few troubleshooting steps you can try to get it working again.

RSLinx can have only one instance running at a time. NOTE: When you do this you will no longer be able to open the RSLinx Classic project editor. Rockwell provides a handy control panel for this. Once your project is configured, setup RSLinx to run “as a service” on the computer you are using.Not only is this required but doing this will make accessing tags easier (if you chose a user friendly alias). Make sure that the PLC you want to talk to has a DDE/OPC topic shortcut or alias configured inside RSLinx.If you have RSLinx installed and are using it as an OPC server there are a few things you need to do: However, it can also be used as an OPC server for various OPC clients, such as ClearSCADA, etc. Typically it is used solely with Rockwell and Allen Bradley products.

ADDING A DEVICE TO RSLINX CLASSIC PLUS

It allows users to connect to Allen Bradley PLCs and PACs as well as Panelview Plus HMIs and other equipment that speaks Ethernet IP, DF1 or DH+ (and their variants). Rockwell Software’s RSLinx is the communication hub for their RSLogix and FactoryTalk programming suites.