8.3.1 is not vulnerable to Heartbleed as it is not running the OpenSSL version that is affected.
This KB article should explain more about Heartbleed and Firewall Enterprise:
REGISTERED - Firewall Enterprise response to CVE-2014-0160 Heartbleed KB81699
Kev was actually supposed to ask about the new SSL vulnerabilities, handled in:
There's patches for 7.0.1, 8.2.1, and 8.3.2. 8.3.1 is not listed as vulnerable or not vulnerable.
Ok, got it. There will be a patch created for 8.3.1 for those vulnerabilities. What you need to do is open up a new case with Support so they can send it as soon as it is ready.