Paper/patches/server/0383-Prevent-position-desync-causing-tp-exploit.patch

31 lines
1.8 KiB
Diff
Raw Normal View History

2021-06-11 14:02:28 +02:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Fri, 12 Jun 2020 16:51:39 -0700
Subject: [PATCH] Prevent position desync causing tp exploit
2021-06-11 14:02:28 +02:00
Caused the server to revert to the player's overworld coordinates
after teleporting into the end.
Sidenote: The underlying issue is that the move call can teleport
entities and do other things like kill the entity. In the future,
to fix all exploits derieved from this usually unexpected
behaviour, we need to move all of this dangerous logic outside
of the move call and into an appropriate place in the tick method.
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index c0907af0169862702a4f28985d141c0acb506f51..2eeeb1f1b07db439a68d70c55192aa9fb54f620c 100644
2021-06-11 14:02:28 +02:00
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1366,6 +1366,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
2021-06-11 14:02:28 +02:00
2023-06-08 01:20:26 +02:00
this.player.move(MoverType.PLAYER, new Vec3(d6, d7, d8));
this.player.onGround = packet.isOnGround(); // CraftBukkit - SPIGOT-5810, SPIGOT-5835, SPIGOT-6828: reset by this.player.move
2021-06-11 14:02:28 +02:00
+ // Paper start - prevent position desync
+ if (this.awaitingPositionFromClient != null) {
+ return; // ... thanks Mojang for letting move calls teleport across dimensions.
+ }
+ // Paper end - prevent position desync
2023-06-08 01:20:26 +02:00
double d11 = d7;
2021-06-11 14:02:28 +02:00
2023-06-08 01:20:26 +02:00
d6 = d0 - this.player.getX();