Provide references for CVE-2019-13520.
Where can I find more information about CVE-2019-13520?
References are available at: https://www.us-cert.gov/ics/advisories/icsa-19-227-02, https://www.zerodayinitiative.com/advisories/ZDI-19-798/, https://www.zerodayinitiative.com/advisories/ZDI-19-820/.