Step 2) If prompted by Windows select Yes to allow the program to run: Step 3) When the EDS Wizard runs select Next: Step 4) Then select Next: Step 5) Review the EDS files listed and then click on Next: Step 6) If you would like to change the default icons do so on this screen. If it does, you'll see the below option to upload the EDS file from the device which you'll want to select: Note: If you don't see this option, skip to the next section of this article. Step 1) The first step is to right click on the device in question to see if it has it's EDS file embedded and ready to be uploaded.
NOTE:If you try to use a very old version of RSLinx Classic with new hardware, the below procedure may not work.īut, since all versions of RSLinx Classic Lite are free (link: how to download Rockwell Software updates) there's typically no reason to use an old version with new hardware.
With that in mind, in today's article I'll cover how to install EDS Files to enable communications and eliminate “yellow question marks” in RSLinx. This vulnerability is not exploitable remotely.It's not uncommon for new products to show up in RSLinx's RSWho as “yellow question marks.” And in most cases to connect to the device in question you'll need to install the appropriate EDS file. No known public exploits specifically target this vulnerability. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.Do not click web links or open unsolicited attachments in email messages.Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.ĬISA also recommends users take the following measures to protect themselves from social engineering attacks: Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.Īdditional mitigation guidance and recommended practices are publicly available on the ICS webpage on in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies. Also recognize that VPN is only as secure as the connected devices.ĬISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.ĬISA also provides a section for control systems security recommended practices on the ICS webpage on. When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available.Locate control system networks and remote devices behind firewalls, and isolate them from the business network.Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.Affected users are encouraged to apply the most recent version of RSLinx Classic.ĬISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.
MITIGATIONSįor Versions 3.60 to 4.11, Rockwell Automation recommends users apply patch 1091155.
Rockwell Automation working with Applied Risk reported this vulnerability to CISA.
The following versions of RSLinx Classic PLC communications software are affected:ģ.2 VULNERABILITY OVERVIEW 3.2.1 INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732Īn authenticated local attacker could modify a registry key, which could lead to the execution of malicious code using system privileges when opening RSLinx Classic.ĬVE-2020-10642 has been assigned to this vulnerability. Successful exploitation of this vulnerability could allow a local authenticated attacker to execute malicious code when opening RSLinx Classic.