Interested in details about this; where were Doom's major security issues? I love reading about Carmack/Doom development in general, maybe I've missed the part where caution was thrown to the wind and security was ignored.
On a related note: Doom apparently does contribute to security proof of concepts though. http://www.techtimes.com/articles/15606/20140916/security-ex...
Which makes me wonder if the non-clearing memory issue exists for the printer's video driver and whether that could be used to retrieve something like a saved password or ssh key.