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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
31 lines
2.3 KiB
Diff
31 lines
2.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Sun, 18 Apr 2021 21:27:01 +0100
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Subject: [PATCH] Add bypass host check
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Paper.bypassHostCheck
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Seriously, fix your firewalls. -.-
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diff --git a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
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index 9b611fc277baf99a5d24b30a11f0efa77b22693f..0c6d172c8b723d2ceff7443dfe50ae280cb6dc2d 100644
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--- a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
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@@ -30,6 +30,7 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
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private static final Component IGNORE_STATUS_REASON = Component.translatable("disconnect.ignoring_status_request");
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private final MinecraftServer server;
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private final Connection connection;
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+ private static final boolean BYPASS_HOSTCHECK = Boolean.getBoolean("Paper.bypassHostCheck"); // Paper
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public ServerHandshakePacketListenerImpl(MinecraftServer server, Connection connection) {
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this.server = server;
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@@ -129,7 +130,7 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
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if (!handledByEvent && proxyLogicEnabled) {
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// Paper end - PlayerHandshakeEvent
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// if (org.spigotmc.SpigotConfig.bungee) { // Paper - comment out, we check above!
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- if ( ( split.length == 3 || split.length == 4 ) && ( ServerHandshakePacketListenerImpl.HOST_PATTERN.matcher( split[1] ).matches() ) ) {
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+ if ( ( split.length == 3 || split.length == 4 ) && ( ServerHandshakePacketListenerImpl.BYPASS_HOSTCHECK || ServerHandshakePacketListenerImpl.HOST_PATTERN.matcher( split[1] ).matches() ) ) { // Paper - Add bypass host check
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this.connection.hostname = split[0];
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this.connection.address = new java.net.InetSocketAddress(split[1], ((java.net.InetSocketAddress) this.connection.getRemoteAddress()).getPort());
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this.connection.spoofedUUID = com.mojang.util.UndashedUuid.fromStringLenient( split[2] );
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