After reading the article, I can conclude that Codex discovered nothing new.
This is already something that is known, and if you're able to be targeted by this (which is not the majority of users) configure your httpd differently.
swedishuser 1 hours ago [-]
Apache and nginx maintainers implemented fixes one or two days after the author reported, so how do you mean this was known already?
BobbyTables2 9 hours ago [-]
Couldn’t simple fuzzing have found this?
pixel_popping 3 hours ago [-]
Not really, as it wasn't found for close to a decade (>5 years for most webservers).
This appears to be fixed as of April (at least for Apache). [0].
[0] - https://github.com/nginx/nginx/commit/365694160a85229a7cb006...
This is already something that is known, and if you're able to be targeted by this (which is not the majority of users) configure your httpd differently.