Fixes CVE-2019-9636 CVE-2019-5010 CVE-2018-14647

Change-Id: If0a115960aed1ee90b63e6716c844669f0ec91e5
Reviewed-on: https://gerrit.libreoffice.org/70182
Tested-by: Jenkins
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>
(cherry picked from commit 3c7354a8)
Reviewed-on: https://gerrit.libreoffice.org/70194Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>