Schneider Electric EcoStruxure Control Expert, Process Expert, Modicon M340, M580 and M580 CPU Authentication Bypass By Capture-Replay (CVE-2022-45789)

critical Tenable OT Security Plugin ID 500879

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-294: Authentication Bypass by Capture-replay vulnerability exists that could cause execution of unauthorized Modbus functions on the controller when hijacking an authenticated Modbus session.
Affected Products: EcoStruxure Control Expert (All Versions), EcoStruxure Process Expert (Versions prior to V2020), Modicon M340 CPU - part numbers BMXP34* (All Versions), Modicon M580 CPU - part numbers BMEP* and BMEH* (All Versions), Modicon M580 CPU Safety - part numbers BMEP58*S and BMEH58*S (All Versions)

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Schneider Electric has released the following remediations and mitigations for users to implement:

- EcoStruxure Process Expert: Version V2021 is available for download and is not impacted by this vulnerability as the affected component has been removed from this version.
- EcoStruxure Control Expert: Set up a VPN between the Modicon PLC controllers and the engineering workstation containing EcoStruxureTM Control.
- EcoStruxure Control Expert: Harden the workstation running EcoStruxure Control Expert.
- EcoStruxure Process Expert: Set up a VPN between the Modicon PLC controllers and the engineering workstation containing EcoStruxureTM Control.
- EcoStruxure Process Expert: Harden the workstation running EcoStruxure Process Expert.
- Modicon M340 CPU (part numbers BMXP34*): Set up an application password in the project properties.
- Modicon M340 CPU (part numbers BMXP34*): Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP.
- Modicon M340 CPU (part numbers BMXP34*): Set up a secure communication according to the following guideline “Modicon Controllers Platform Cyber Security Reference Manual,” in chapter “Set up secured communications”.
- Modicon M340 CPU (part numbers BMXP34*): Configure the access control list following the recommendations of the user manuals: Modicon M340 for Ethernet Communications Modules and Processors user manual in chapter “Messaging Configuration Parameters”.
- Modicon M340 CPU (part numbers BMXP34*): Consider the use of external firewall devices such as EAGLE40-07 from Belden to establish VPN connections for M340 & M580 architectures. For more details refer to Modicon Controllers Platform - Cyber Security, Reference Manual chapter “How to protect M580 and M340 architectures with EAGLE40 using VPN”.
- Modicon M580 CPU (part numbers BMEP* and BMEH*): Set up an application password in the project properties.
- Modicon M580 CPU (part numbers BMEP* and BMEH*): Set up network segmentation and implement a firewall to block all unauthorized access to port 502/TCP.
- Modicon M580 CPU (part numbers BMEP* and BMEH*): Configure the access control list following the recommendations of the user manuals: Modicon M580, Hardware, Reference Manual.
- Modicon M580 CPU (part numbers BMEP* and BMEH*): Setup a secure communication following recommended guidelines in Modicon Controllers Platform - Cyber Security Reference Manual chapter “Setup secured communications”.
- Modicon M580 CPU (part numbers BMEP* and BMEH*): Use a BMENUA0100 module and follow the instructions to configure IPSEC feature as described in M580 - BMENUA0100 OPC UA Embedded Module, Installation and Configuration Guide chapter “Configuring the BMENUA0100 Cybersecurity Settings”.

For more information, see Schneider Electric’s security advisory SEVD-2023-010-06.

Schneider Electric strongly recommends the following industry cybersecurity best practices:

- Locate control and safety system networks and remote devices behind firewalls and isolate them from the business network.
- Install physical controls so no unauthorized personnel can access your industrial control and safety systems, components, peripheral equipment, and networks.
- Place all controllers in locked cabinets and never leave them in the “Program” mode.
- Never connect programming software to any network other than the network intended for that device.
- Scan all methods of mobile data exchange with the isolated network such as CDs, USB drives, etc., before use in the terminals or any node connected to these networks.
- Never allow mobile devices that have connected to any other network besides the intended network to connect to the safety or control networks without proper sanitation.
- Minimize network exposure for all control system devices and systems and ensure that they are not accessible from the internet.
- When remote access is required, use secure methods, such as virtual private networks (VPNs). Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices.
- For more information refer to the Schneider Electric Recommended Cybersecurity Best Practices document.

Plugin Details

Severity: Critical

ID: 500879

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 3/9/2023

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2022-45789

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:schneider-electric:modicon_m340_bmxp341000_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342020_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342030_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh582040_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh582040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh582040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh584040_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh584040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh584040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh586040_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh586040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh586040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmep581020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep581020h_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582020h_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582040h_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmep583020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep583040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep584020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep584040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep584040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmep585040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep585040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmep586040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep586040c_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342000_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp3420102_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp3420302_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342010_firmware:-, cpe:/o:schneider-electric:modicon_m340_bmxp342020h_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp3420302h_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342030h_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 1/31/2023

Vulnerability Publication Date: 1/31/2023

Reference Information

CVE: CVE-2022-45789

CWE: 294

Detections

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