Schneider Electric Modicon Controllers (Update A)

Risk Summary

Successful exploitation of this vulnerability could allow an attacker to cause a victim's browser to run arbitrary JavaScript when visiting a page containing injected payload.

CVEs (1)

Remediations

• Schneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk:
• Schneider Electric Modicon Controllers Version prior to v5.2.11.24: Modicon Controller M241 Firmware version 5.2.11.24 delivered with EcoStruxure Machine Expert v2.2.2 includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/2226-ecostruxure-machine-expert-software/ On the engineering workstation, update to v2.2.2 of EcoStruxure Machine Expert. Update Modicon Controller M241 to the latest Firmware and perform reboot
• Schneider Electric Modicon Controllers Version prior to v5.2.11.24: Modicon Controller M251 Firmware version 5.2.11.24 delivered with EcoStruxure Machine Expert v2.2.2 includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/2226-ecostruxure-machine-expert-software/ On the engineering workstation, update to v2.2.2 of EcoStruxure Machine Expert. Update Modicon Controller M251 to the latest Firmware and perform reboot
• Schneider Electric Modicon Controllers M262 Versions prior to v5.2.8.26: Modicon Controller M262 Firmware version 5.2.8.26 delivered with EcoStruxure Machine Expert v2.2.2 includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/2226-ecostruxure-machine-expert-software/ On the engineering workstation, update to v2.2.2 of EcoStruxure Machine Expert. Update Modicon Controller M262 to the latest Firmware and perform reboot
• Schneider Electric Modicon Controllers Version prior to v5.2.11.24, Schneider Electric Modicon Controllers M258 / LMC058 All versions , Schneider Electric Modicon Controllers M262 Versions prior to v5.2.8.26, Schneider Electric Modicon Controllers Version prior to v5.2.11.24: Modicon Controller M262 Firmware version 5.2.8.26 delivered with EcoStruxure Machine Expert v2.2.2 includes a fix for this vulnerability and can be updated through the Schneider Electric Software Update (SESU) application. https://www.se.com/ww/en/product-range/2226-ecostruxure-machineexpert-software/ On the engineering workstation, update to v2.2.2 of EcoStruxure Machine Expert. By using Controller Assistant from EcoStruxureTM Machine Expert update Modicon Controller M258/LMC058 and perform reboot .
• Users should observe appropriate patching methodologies when applying these patches to their systems. We strongly recommend the use of back-ups and evaluating the impact of these patches in a Test and Development environment or on an offline infrastructure. Contact Schneider Electric's Customer Care Center if you need assistance removing a patch.
• If users choose not to apply the remediation provided above they should immediately apply the following mitigations to reduce the risk of exploit:
• Users should immediately apply the following mitigations to reduce the risk of exploit: Use controllers and devices only in a protected environment to minimize network exposure and ensure that they are not accessible from public internet or untrusted networks. Ensure application of user management and password features. User rights are enabled by default and forced to create a strong password at first use. Deactivate the Webserver after use, when not needed. Use encrypted communication links. Setup network segmentation and implement a firewall to block all unauthorized access to port 80/HTTP and 443/HTTPS. Use VPN (Virtual Private Networks) tunnels if remote access is required. The "Cybersecurity Guidelines for EcoStruxure Machine Expert, Modicon and PacDrive Controllers and Associated Equipment" provide product specific chapters to ensure you are informed of all updates, including details on affected products and remediation plans. Subscribe to Schneider Electric's security notification service here.
• For more information, refer to the Schneider Electric Recommended Cybersecurity Best Practices document and the associated Schneider Electric Security Notification SEVD-2024-191-04 in PDF and CSAF.

Affected Vendors

Affected Products (4)

Affected Sectors

Commercial Facilities, Critical Manufacturing, and Energy