VulnerabilityModified
CVE-2020-12526
KG are vulnerable to denial of service attacks.
MEDIUM 5.3EPSS 0.95%
Does this matter?
Lower severity and a low EPSS score (0.95%). Track it; it rarely justifies an emergency change on its own.
Description
TwinCAT OPC UA Server in versions up to 2.3.0.12 and IPC Diagnostics UA Server in versions up to 3.1.0.1 from Beckhoff Automation GmbH & Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 0.95% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- beckhoff/ipc diagnostics ua server · beckhoff/tf6100 · beckhoff/twincat opc ua server
- Source
- info@cert.vde.com
References
- https://cert.vde.com/en-us/advisories/vde-2020-051Third Party Advisory
- https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdfVendor Advisory
- https://cert.vde.com/en-us/advisories/vde-2020-051Third Party Advisory
- https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdfVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.