CVE-2019-5637

Public Exploit
Beckhoff TwinCAT Profinet Driver Divide-by-Zero Denial of Service

Description

When Beckhoff TwinCAT is configured to use the Profinet driver, a denial of service of the controller could be reached by sending a malformed UDP packet to the device. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior).

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.57%
Vendor Advisory beckhoff.com
Affected: Beckhoff TwinCAT 2
Affected: Beckhoff TwinCAT 3.1
Published at:
Updated at:

References

Link Tags
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/ third party advisory exploit
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-007.pdf mitigation vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-5637?
CVE-2019-5637 has been scored as a high severity vulnerability.
How to fix CVE-2019-5637?
To fix CVE-2019-5637, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-5637 being actively exploited in the wild?
It is possible that CVE-2019-5637 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-5637?
CVE-2019-5637 affects Beckhoff TwinCAT 2, Beckhoff TwinCAT 3.1.
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