CVE-2018-7846 — CRITICAL (9.8)

Vulnerability Description

A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauthorized access by conducting a brute force attack on Modbus protocol to the controller.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Schneider-Electric	Modicon M580 Firmware	All versions
Schneider-Electric	Modicon M580	-
Schneider-Electric	Modicon M340 Firmware	All versions
Schneider-Electric	Modicon M340	-
Schneider-Electric	Modicon Quantum Firmware	All versions
Schneider-Electric	Modicon Quantum	-
Schneider-Electric	Modicon Premium Firmware	All versions
Schneider-Electric	Modicon Premium	-

Related Weaknesses (CWE)

CWE-668

References

https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735ExploitThird Party Advisory
https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735ExploitThird Party Advisory

FAQ

What is CVE-2018-7846?

CVE-2018-7846 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauth...

How severe is CVE-2018-7846?

CVE-2018-7846 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2018-7846?

Check the references section above for vendor advisories and patch information. Affected products include: Schneider-Electric Modicon M580 Firmware, Schneider-Electric Modicon M580, Schneider-Electric Modicon M340 Firmware, Schneider-Electric Modicon M340, Schneider-Electric Modicon Quantum Firmware.