Redox also takes some inspiration from Plan9 and https://doc.redox-os.org/book/ch05-00-schemes-resources.html is interesting. Also reading https://drewdevault.com/2022/11/12/In-praise-of-Plan-9.html made me a bit more interested in things trying to be more Plan9-like than Unix-like.
This is a real exploit chain in
cups-browsed
. The tl;dr is that it will add basically anything that knows the correct protocol to your list of available printers, and this can be exploited for RCE if you print to the malicious printer. The service listens on all interfaces by default on UDP 631.It is not as horrible as it was marketed, but it’s real and not great. You may or may not have this service running by default; I didn’t on Fedora.
His full write-up is here: https://www.evilsocket.net/2024/09/26/Attacking-UNIX-systems-via-CUPS-Part-I/