from what i understand, Comodo does not block the exploit, but can probably still detect programs that get to your computer though it and is most likely getting signatures of the latest viruses that abuse it. the main problem (and i am just guessing right now) is that hackers can use this exploit to download and run unwanted programs on your computer, without you being able to see or agree to that download. am i guessing right?
The latest Java (update 11) protects against this particular exploit. It also changes the security level from Medium to High. Disabling the plugin is another option,