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Attacking UNIX Systems via CUPS, Part I | CUPS Remote Code Execution
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this post was submitted on 26 Sep 2024
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Mdns is something most people have no idea exists.
Oh, neat, all my devices broadcast all their open ports, services, addresses, hardware and names? Cool!
No.
If your router/firewall is configured to let these broadcasts through you have a problem. If it is working correctly and you have an attacker on your lan? You have already lost.
It depends. If you're using a laptop and say you take it to university or work then you're not on your LAN. You're on someone else's LAN and they may have no interest in trying to stop these types of attacks via any kind of client isolation or it may be incomplete.
I can imagine it's a very normal scenario for university students to have CUPS running and available on all networks as they may need to print at their university.
You've just described every enterprise who allows Linux in their environment.
Going to rely on security through obscurity instead?
Errr I use mdns all the time...