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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: e2160a18 Make MapCursor#type not depends on deprecated values CraftBukkit Changes: 6ce172642 SPIGOT-7761: Ender pearl does not damage or spawn endermites f5a63f734 SPIGOT-7759: Chunk not there when requested in ChunkUnloadEvent 28287259c Remove unused import eb9a7dde0 SPIGOT-7757: Cannot set item in Stonecutter Inventory f8be9d752 Move deserialized removed unhandled tags to dedicated removedTags a7e576186 Fix potential mutability issue with CraftMetaItem copy constructor 995885452 SPIGOT-7741: Vanilla ItemComponent in commands can't remove components 9ef69aa0b PR-1284: Move ItemType <-> ItemMeta linking to a centralized place 3e82eafbe PR-1420: Fix DirectEntity and CausingEntity Damager for Creepers ignited by Player c23daa71f SPIGOT-7751: Fix crash caused by arrows from trial spawners Make MapCursor#type not depends on deprecated values SPIGOT-7761: Ender pearl does not damage or spawn endermites
30 lines
1.8 KiB
Diff
30 lines
1.8 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 causing tp 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 ebeada0d62a71123e70fbafe3cb3232866e915f1..97059c8199bc80f3982556a4094f02b03138dc6c 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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@@ -1350,6 +1350,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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this.player.move(MoverType.PLAYER, new Vec3(d6, d7, d8));
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this.player.onGround = packet.isOnGround(); // CraftBukkit - SPIGOT-5810, SPIGOT-5835, SPIGOT-6828: 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 d11 = d7;
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d6 = d0 - this.player.getX();
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