Blocking MiTM (Man in the Middle) attack

I am failing a PCI scan. I have a TZ400 with IPS turned on. but the PCI scan is failing with:

OpenSSL 'ChangeCipherSpec' MiTM
Vulnerability www (443/tcp)
CVE-2010-5298, CVE-2014-0076, CVE-2014-
0195, CVE-2014-0198, CVE-2014-0221, CVE-
2014-0224, CVE-2014-3470

How can I block stop that. I need 443 open to the SBS server for email access.I am assuming that the Sonicwall can/ should stop the MiTM attack,

Thanks