CVE Vulnerability

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).

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf Vendor Advisory
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/ Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:beckhoff:twincat:2.0:build2304:*:*:*:*:*:*
cpe:2.3:a:beckhoff:twincat:3.1:build4024.0:*:*:*:*:*:*
Information

Published : 2019-11-21 08:15

Updated : 2020-02-04 11:15

NVD link : CVE-2019-5636

Mitre link : CVE-2019-5636

Products Affected
No products.
CWE
CWE-404