So. My bet is their using old insecure versions of Linux. Given that they don't have access to the wider internet how can security vulnerabilities be patched vi

So. My bet is their using old insecure versions of Linux. Given that they don't have access to the wider internet how can security vulnerabilities be patched via downloading updates? It would be interesting if someone created a worm that spread among all redstar os users in North Korea, that downloads "dangerous" information from the outside world