I have been doing a task on detecting if httpoxy exists on a web server. I did not have any idea about it initially. After reading from a couple of sites, I understood how it works but I'm still unclear at certain places.
My understanding: The HTTP headers value are made available to CGI programs through environment variables.
Example: If we specify PATH in the header, it gets converted to HTTP_PATH.
Doubt: If we specify a non-existing header like Proxy, Will that get converted to HTTP_PROXY which collides with the already existing HTTP_PROXY environment variable that is set for proxy?