Merge branch '2021-02-15-fix-CVE-2021-27097-CVE-2021-27138'

Fix CVE-2021-27097 and CVE-2021-27138.  For more details see
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27097 and
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27138