mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-30 04:02:50 +01:00
55 lines
3.1 KiB
Diff
55 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Shane Freeder <theboyetronic@gmail.com>
|
|
Date: Sun, 18 Apr 2021 21:27:01 +0100
|
|
Subject: [PATCH] Validate bungee forwarded hostname
|
|
|
|
Seriously, fix your firewalls. -.-
|
|
|
|
diff --git a/src/main/java/net/minecraft/server/network/HandshakeListener.java b/src/main/java/net/minecraft/server/network/HandshakeListener.java
|
|
index b97d289afdff81d9959e238639f4e3e186f8e9c8..423696df365ceb20b673a87714b753d7b3b7a3af 100644
|
|
--- a/src/main/java/net/minecraft/server/network/HandshakeListener.java
|
|
+++ b/src/main/java/net/minecraft/server/network/HandshakeListener.java
|
|
@@ -1,5 +1,8 @@
|
|
package net.minecraft.server.network;
|
|
|
|
+import com.google.common.net.InetAddresses;
|
|
+import com.google.common.net.InternetDomainName;
|
|
+
|
|
import net.minecraft.SharedConstants;
|
|
import net.minecraft.network.EnumProtocol;
|
|
import net.minecraft.network.NetworkManager;
|
|
@@ -26,6 +29,7 @@ public class HandshakeListener implements PacketHandshakingInListener {
|
|
private static final IChatBaseComponent a = new ChatComponentText("Ignoring status request");
|
|
private final MinecraftServer b;
|
|
private final NetworkManager c; final NetworkManager getNetworkManager() { return this.c; } // Paper - OBFHELPER
|
|
+ private static final boolean BYPASS_HOSTCHECK = Boolean.getBoolean("Paper.bypassHostCheck"); // Paper
|
|
|
|
public HandshakeListener(MinecraftServer minecraftserver, NetworkManager networkmanager) {
|
|
this.b = minecraftserver;
|
|
@@ -114,6 +118,14 @@ public class HandshakeListener implements PacketHandshakingInListener {
|
|
//if (org.spigotmc.SpigotConfig.bungee) { // Paper - comment out, we check above!
|
|
String[] split = packethandshakinginsetprotocol.hostname.split("\00");
|
|
if ( split.length == 3 || split.length == 4 ) {
|
|
+ // Paper start
|
|
+ if (!BYPASS_HOSTCHECK && !validate(split[1])) {
|
|
+ final ChatMessage message = new ChatMessage("Invalid hostname");
|
|
+ this.getNetworkManager().sendPacket(new PacketLoginOutDisconnect(message));
|
|
+ this.getNetworkManager().close(message);
|
|
+ return;
|
|
+ }
|
|
+ // Paper end
|
|
packethandshakinginsetprotocol.hostname = split[0];
|
|
c.socketAddress = new java.net.InetSocketAddress(split[1], ((java.net.InetSocketAddress) c.getSocketAddress()).getPort());
|
|
c.spoofedUUID = com.mojang.util.UUIDTypeAdapter.fromString( split[2] );
|
|
@@ -158,4 +170,11 @@ public class HandshakeListener implements PacketHandshakingInListener {
|
|
public NetworkManager a() {
|
|
return this.c;
|
|
}
|
|
+
|
|
+ // Paper start - https://stackoverflow.com/questions/9954140/check-if-a-string-is-a-hostname-or-an-ip-address-in-java
|
|
+ public static boolean validate(final String hostname) {
|
|
+ //noinspection UnstableApiUsage
|
|
+ return InetAddresses.isUriInetAddress(hostname);
|
|
+ }
|
|
+ // Paper end
|
|
}
|