Provide references for CVE-2020-3239.
Where can I find more information about CVE-2020-3239?
References are available at: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsd-mult-vulns-UNfpdW4E, https://www.zerodayinitiative.com/advisories/ZDI-20-539/.