What is CVE-2019-5636?

CVE-2019-5636 is a medium-severity vulnerability in Beckhoff Twincat, classified under Improper Resource Shutdown or Release. CVSS score: 5.3/10. Published 2019-11-21.

How severe is CVE-2019-5636?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Beckhoff Twincat

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 vers…

EPSS: 0.014 (70.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Beckhoff Twincat — versions 2.0, 3.1
Beckhoff Twincat 2 — versions 2304
Beckhoff Twincat 3.1 — versions 4204.0

Weakness classification (CWE)

CWE-404 — Improper Resource Shutdown or Release

References

cve@rapid7.com (x_refsource_CONFIRM, Vendor Advisory)
cve@rapid7.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-5636?: CVE-2019-5636 is a medium-severity vulnerability in Beckhoff Twincat, classified under Improper Resource Shutdown or Release. CVSS score: 5.3/10. Published 2019-11-21.
How severe is CVE-2019-5636?: Medium severity. CVSS v3 base score is 5.3 out of 10.