Provide references for CVE-2021-43391.
Where can I find more information about CVE-2021-43391?
References are available at: https://www.opendesign.com/security-advisories, https://www.zerodayinitiative.com/advisories/ZDI-21-1352/, https://www.zerodayinitiative.com/advisories/ZDI-21-1361/, https://cert-portal.siemens.com/productcert/pdf/ssa-491245.pdf.