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CVE-2019-5636

Beckhoff TwinCAT Discovery Service Denial of Service

Published: Nov 21, 2019Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-404
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
1.4%
Top 30.5%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

When a Beckhoff TwinCAT Runtime receives a malformed UDP packet, the ADS Discovery Service shuts down. Note that the TwinCAT devices are still performing as normal. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior).

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-404

Affected Products

TwinCATBeckhoff Automation GmbH & Co. KG
Mixed
ICS / OT / IoT / plc-scada-hmi
TwinCAT 2Beckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
TwinCAT 3.1Beckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
twincatbeckhoff
Embedded
ICS / OT / IoT / plc-scada-hmi
beckhoff automation gmbh & co. kgcommercialDEICS / OT / IoTaka beckhoff, twincat
beckhoffcommercialICS / OT / IoTaka twincat, twincat/bsd

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf
download.beckhoff.com
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/
blog.rapid7.com

Timeline

Published
Nov 21, 2019
Last Updated
Nov 21, 2024

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