Fixes the following CVEs: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11409 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11406 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11407 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11408