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Schneider Electric Modicon M340 DoS Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Schneider Electric Modicon M340 devices are prone to a denial of service vulnerability.
Insight
Insight
During communication between the operator and PLC using function code 0x5A of Modbus, it is possible to send a specially crafted set of packets to the PLC and cause it to freeze, requiring the operator to physically press the reset button of the PLC in order to recover.
Affected Software
Affected Software
Schneider Electric BMXNOC0401, BMXNOE0100, BMXNOE0110, BMXNOE0110H, BMXNOR0200H, BMXP341000, BMXP342000, BMXP3420102, BMXP3420102CL, BMXP342020, BMXP342020H, BMXP342030, BMXP3420302, BMXP3420302H and BMXP342030H prior to firmware version 2.9.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Upgrade to firmware version 2.9 or later.