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While I agree, it makes connecting to localhost as easy as
http://0:8080/
(for port 8080, but omit for port 80).I worry that changing this will cause more CVEs like the octal IP addresses incident.
Edit: looks like it’s only being blocked for outgoing requests from websites, which seems like it’ll have a much more reasonable impact.
Edit 2: skimming through these PRs, at least for WebKit, I don’t see tests for shorthand IPs like
0
(and no Apple device to test with). What are the chances they missed those…?The thing is that it’s not supposed to work, so it’s essentially relying on undefined behaviour. Typing
[::1]:8080
is nearly as easy.I haven’t seen the PRs, but IP comparison should really be using the binary form of the IPv4 address (a 32-bit number), not the human-friendly form.