Provide references for CVE-2019-13939.
Where can I find more information about CVE-2019-13939?
References are available at: https://cert-portal.siemens.com/productcert/pdf/ssa-434032.pdf, https://cert-portal.siemens.com/productcert/pdf/ssa-162506.pdf, https://us-cert.cisa.gov/ics/advisories/icsa-20-105-06, https://cert-portal.siemens.com/productcert/html/ssa-434032.html, https://cert-portal.siemens.com/productcert/html/ssa-162506.html.