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adc83a5b5c
Going to be used for ACF to be able to send Tooltips to client :) This is after completions are calculated, to control what is sent to the client.
27 lines
No EOL
1.8 KiB
Diff
27 lines
No EOL
1.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 2 May 2020 03:09:46 -0400
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Subject: [PATCH] Validate PickItem Packet and kick for invalid
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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 376f7f8f0b..a33289749c 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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@@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn {
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@Override
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public void a(PacketPlayInPickItem packetplayinpickitem) {
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PlayerConnectionUtils.ensureMainThread(packetplayinpickitem, this, this.player.getWorldServer());
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- this.player.inventory.c(packetplayinpickitem.b());
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+ // Paper start - validate pick item position
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+ if (!(packetplayinpickitem.b() >= 0 && packetplayinpickitem.b() < this.player.inventory.items.size())) {
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+ PlayerConnection.LOGGER.warn("{} tried to set an invalid carried item", this.player.getDisplayName().getString());
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+ this.disconnect("Invalid hotbar selection (Hacking?)");
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+ return;
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+ }
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+ this.player.inventory.c(packetplayinpickitem.b()); // Paper - Diff above if changed
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+ // Paper end
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this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-2, this.player.inventory.itemInHandIndex, this.player.inventory.getItem(this.player.inventory.itemInHandIndex)));
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this.player.playerConnection.sendPacket(new PacketPlayOutSetSlot(-2, packetplayinpickitem.b(), this.player.inventory.getItem(packetplayinpickitem.b())));
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this.player.playerConnection.sendPacket(new PacketPlayOutHeldItemSlot(this.player.inventory.itemInHandIndex));
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--
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