The IPS Signatures can be found here:
Click on Network-Based Protection – Release history, displays Security updates.
Click on the most recent one: - Security Update 703
The first list adds these detections of attacks and second remove the detections
SEP will not cover vulnerabilities if they are not being exploited, so if there is no virus that exploits the software vulnerability, SEP will not have a signature against that.
Click on the ID hyperlink it redirects to http://www.securityfocus.com:
That seems to be the only way to check if those vulnerabilities are exploited and detected by SEP or not.