curl: Unexpected access to process open files via file:///proc/self/fd/n

Summary: fileconnect routine https://github.com/curl/curl/blob/1b71bc532bde8621fd3260843f8197182a467ff2/lib/file.cL134 does not prevent access to /proc/self/fd pseudo filesystem. Application using libcurl and accepting URLs to fetch can be tricked to return content of any open file by passing a...