net/url: parseHost doesn't valid ports or contents after IPv6 literals #11208
Description
URL parsing allows %-ending after [], which allows weird things like:
package main
import (
"bufio"
"bytes"
"net/http"
"os"
)
func main() {
data := []byte("CONNECT []%20%48%54%54%50%2f%31%2e%31%0a%4d%79%48%65%61%64%65%72%3a%20%31%32%33%0a%0a HTTP/1.0\n\n")
r, err := http.ReadRequest(bufio.NewReader(bytes.NewReader(data)))
if err != nil {
panic(err)
}
r.WriteProxy(os.Stdout)
}CONNECT [] HTTP/1.1
MyHeader: 123
HTTP/1.1
Host: [] HTTP/1.1
MyHeader: 123
User-Agent: Go 1.1
%-ending must be allowed only inside of []
go version devel +a1fe3b5 Sat Jun 13 04:33:26 2015 +0000 linux/amd64