What version of SSL does splunkd use?

We have Splunk 4.2.3 installed on some Linux hardened servers. Our Security team recently ran some scans and expressed concern regarding SSL on port 8089. After researching we determined that this port is used for Splunk deployment communication.

It seems that their concern is that the SSL version is too low. They would like to see at least version v3TL1.

I'm not very familiar with SSL. Could you tell me what SSL version Splunk uses? Is it possible to upgrade? What version of SSL does 4.3 use?

Thanks,