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 version 4204.0 (and prior).
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.014 (71.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Beckhoff Twincat — versions 2.0, 3.1
- Beckhoff Twincat 2 — versions 2304
- Beckhoff Twincat 3.1 — versions 4204.0
Weakness classification (CWE)
References
- download.beckhoff.com/download/Document/product-security/Advisories/advisory-20… (Vendor Advisory)
- blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beck… (Exploit, Third Party Advisory)
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.