Vulnerability Details : CVE-2019-5636
Potential exploit
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).
Products affected by CVE-2019-5636
- cpe:2.3:a:beckhoff:twincat:2.0:build2304:*:*:*:*:*:*
- cpe:2.3:a:beckhoff:twincat:3.1:build4024.0:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-5636
0.54%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 65 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-5636
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
3.9
|
1.4
|
cve@rapid7.con | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2019-5636
-
The product does not release or incorrectly releases a resource before it is made available for re-use.Assigned by:
- cve@rapid7.con (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2019-5636
-
https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/
TwinCAT DoS Vulnerability Disclosure (CVE 2019-5637 & 2019-5636)Exploit;Third Party Advisory
-
https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf
Vendor Advisory
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