64ed429884
This is a pretty tiny update with very little changed. Recommended to update from 1.16.2 ASAP as 1.16.2 is now no longer supported. Plugins should mostly remain working as the NMS revision did not change.
32 Zeilen
1.8 KiB
Diff
32 Zeilen
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 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/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
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index def198c58892299f29a55ec99e94dfd2f0ab0b16..f8826f53a3e7c44e50041516e83b92f609a53cb0 100644
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--- a/src/main/java/net/minecraft/server/PlayerConnection.java
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+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
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@@ -1092,6 +1092,11 @@ public class PlayerConnection implements PacketListenerPlayIn {
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this.player.move(EnumMoveType.PLAYER, new Vec3D(d7, d8, d9));
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this.player.setOnGround(packetplayinflying.b()); // 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.teleportPos != 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 = d4 - this.player.locX();
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