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2 vulnerabilities found for 750-889 Controller KNX IP by WAGO

CVE-2019-10953 (GCVE-0-2019-10953)

Vulnerability from nvd – Published: 2019-04-17 14:02 – Updated: 2026-06-04 18:42
VLAI
Summary
ABB, Phoenix Contact, Schneider Electric, Siemens, WAGO - Programmable Logic Controllers, multiple versions. Researchers have found some controllers are susceptible to a denial-of-service attack due to a flood of network packets.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - UNCONTROLLED RESOURCE CONSUMPTION CWE-400
Assigner
References
Impacted products
Credits
Matthias Niedermaier (Hochschule Augsburg), Jan-Ole Malchow (Freie Universität Berlin), and Florian Fischer (Hochschule Augsburg) reported this vulnerability to CISA. Mikael Vingaard found and reported to CISA additional devices containing this vulnerability.
Show details on NVD website
To clipboard 

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              "value": "\u003cspan\u003eABB concludes the reported behavior is not a vulnerability but is due to a misconfiguration of the PLC watchdog, which was left in the default factory settings. This has led to a configuration that does not match the expectations expressed in the test cases and the result is the PLC not reacting as intended. This misconfiguration can be fixed by setting an appropriate combination of task priority, task cycle time, and watchdog settings. Please see the \u201cOnboard Ethernet Handling in CPU Firmware\u201d chapter (System Technology for AC500 V2 Products \u0026gt; System Technology of CPU and Overall System \u0026gt; Onboard Technologies \u0026gt; Ethernet \u0026gt; Ethernet Protocols and Ports for AC500 V2 Products \u0026gt; Onboard Ethernet Handling in CPU Firmware) for further guidance.\u003c/span\u003e"
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CVE-2019-10953 (GCVE-0-2019-10953)

Vulnerability from cvelistv5 – Published: 2019-04-17 14:02 – Updated: 2026-06-04 18:42
VLAI
Summary
ABB, Phoenix Contact, Schneider Electric, Siemens, WAGO - Programmable Logic Controllers, multiple versions. Researchers have found some controllers are susceptible to a denial-of-service attack due to a flood of network packets.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - UNCONTROLLED RESOURCE CONSUMPTION CWE-400
Assigner
References
Impacted products
Credits
Matthias Niedermaier (Hochschule Augsburg), Jan-Ole Malchow (Freie Universität Berlin), and Florian Fischer (Hochschule Augsburg) reported this vulnerability to CISA. Mikael Vingaard found and reported to CISA additional devices containing this vulnerability.
Show details on NVD website
To clipboard 

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              "value": "\u003cp\u003eFixes are available in\u0026nbsp; Schneider Electric\n\nModicon M221 firmware v1.10.0.0 and EcoStruxure Machine Expert \u2013 Basic v1.0 software (formerly SoMachine Basic) using either of the following options:\u003cbr\u003e\u003cbr\u003eUse this link to download the Machine Expert Basic software.\u003c/p\u003e\u003cp\u003eOr run the Schneider Electric Software Update tool in order to download and install EcoStruxure Machine Expert \u2013 Basic v1.0 software.\u003c/p\u003e\u003cp\u003eFor additional information, see the Schneider Electric security notice SEVD-2019-045-01. (https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2019-045-01)\u003c/p\u003e\u003cp\u003eSchneider Electric strongly recommends following industry cybersecurity best practices, such as:\u003c/p\u003e\u003cul\u003e\u003cli\u003ePhysical controls should be in place so no unauthorized person would have access to the ICS and safety controllers, peripheral equipment, or the ICS and safety networks.\u003c/li\u003e\u003cli\u003eAll controllers should reside in locked cabinets and never be left in the \u201cProgram\u201d mode.\u003c/li\u003e\u003cli\u003eAll programming software should be kept in locked cabinets and should never be connected to any network other than the network for the devices it is intended.\u003c/li\u003e\u003cli\u003eAll methods of mobile data exchange with the isolated network (e.g., CDs, USB drives, etc.) should be scanned before use in terminals or any node connected to these networks.\u003c/li\u003e\u003cli\u003eLaptops that have connected to any other network besides the intended network should never be allowed to connect to the safety or control networks without proper sanitation.\u003c/li\u003e\u003c/ul\u003e"
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              "value": "\u003cspan\u003eABB concludes the reported behavior is not a vulnerability but is due to a misconfiguration of the PLC watchdog, which was left in the default factory settings. This has led to a configuration that does not match the expectations expressed in the test cases and the result is the PLC not reacting as intended. This misconfiguration can be fixed by setting an appropriate combination of task priority, task cycle time, and watchdog settings. Please see the \u201cOnboard Ethernet Handling in CPU Firmware\u201d chapter (System Technology for AC500 V2 Products \u0026gt; System Technology of CPU and Overall System \u0026gt; Onboard Technologies \u0026gt; Ethernet \u0026gt; Ethernet Protocols and Ports for AC500 V2 Products \u0026gt; Onboard Ethernet Handling in CPU Firmware) for further guidance.\u003c/span\u003e"
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              "value": "\u003cp\u003ePhoenix Contact acknowledges this as a \u201cknown, won\u2019t fix\u201d issue for old products. Currently available products provide countermeasures to mitigate the impact on the safety-related functionality. Phoenix Contact urges users to adhere to the\u0026nbsp;Application note 107913_en_01.\u003c/p\u003e\u003cp\u003eMore information can be found in the\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003ca href=\"https://cert.vde.com/en-us/advisories/vde-2018-012\"\u003eVDE CERT advisory\u003c/a\u003e.\u003c/p\u003e"
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              "value": "\u003cspan\u003eSiemens has investigated the vulnerability report on PLC cycle time influences and concludes the report does not demonstrate a valid vulnerability for Siemens PLCs.\u003c/span\u003e"
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              "value": "\u003cspan\u003eWAGO recommends users operate the devices in closed networks or protect them with a firewall against unauthorized access. Another recommended mitigation is to limit network traffic via the switch rate limit feature according to application needs.\u003c/span\u003e\u003cbr\u003e\u003cspan\u003ePlease also consult the product manuals on the WAGO website, as this is a known problem for some devices. Links to product manuals and specific instructions about how to limit switch rates can be found in the\u003cspan\u003e\u0026nbsp;\u003c/span\u003e\u003c/span\u003e\u003ca href=\"https://cert.vde.com/de-de/advisories/vde-2018-013\"\u003eVDE CERT advisory\u003c/a\u003e\u003cspan\u003e.\u003c/span\u003e"
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