Denial of Service Vulnerability in Modicon PLCs via Invalid Web Server Image Upgrade

Denial of Service Vulnerability in Modicon PLCs via Invalid Web Server Image Upgrade

CVE-2019-6844 · MEDIUM Severity

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

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Modicon BMxCRA and 140CRA modules (all firmware versions), which could cause a Denial of Service atack on the PLC when upgrading the controller with a firmware package containing an invalid web server image using FTP protocol.

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