06db5d08b0
Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Bukkit Changes: 44cfe143 SPIGOT-6249: Add Missing Effect Constants CraftBukkit Changes: 14928261 SPIGOT-6249: Add Missing Effect Constants 332335e1 SPIGOT-6731: "Nag author" message in CraftServer lists one author only 6cd975d0 SPIGOT-5732, SPIGOT-6387: Overhaul Hanging entities
32 lines
1.9 KiB
Diff
32 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Fri, 12 Jun 2020 16:51:39 -0700
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Subject: [PATCH] Prevent position desync in playerconnection causing tp
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exploit
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Caused the server to revert to the player's overworld coordinates
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after teleporting into the end.
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Sidenote: The underlying issue is that the move call can teleport
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entities and do other things like kill the entity. In the future,
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to fix all exploits derieved from this usually unexpected
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behaviour, we need to move all of this dangerous logic outside
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of the move call and into an appropriate place in the tick method.
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index fa291673ab392af499c38d0a3b31bbdb664a3a68..6ed7a2cd6a18ffb925e511045d5e0a6c5b45d2de 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -1325,6 +1325,11 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
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this.player.move(MoverType.PLAYER, new Vec3(d7, d8, d9));
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this.player.setOnGround(packet.isOnGround()); // CraftBukkit - SPIGOT-5810, SPIGOT-5835: reset by this.player.move
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+ // Paper start - prevent position desync
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+ if (this.awaitingPositionFromClient != null) {
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+ return; // ... thanks Mojang for letting move calls teleport across dimensions.
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+ }
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+ // Paper end - prevent position desync
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double d12 = d8;
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d7 = d0 - this.player.getX();
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