Vulnerability Monitor

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CVE-2019-5636

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).

Published

2019-11-21T20:15:15.897

Last Modified

2024-11-21T04:45:16.907

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-404
Type: Primary
CWE-404

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	beckhoff	twincat	2.0	Yes
Application	beckhoff	twincat	3.1	Yes

References

https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/ Exploit, Third Party Advisory ([email protected])
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf Vendor Advisory ([email protected])
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)