Paper/patches/server/0385-Validate-PickItem-Packet-and-kick-for-invalid.patch
Jake Potrebic d8847bc1f3
Updated Upstream (Bukkit/CraftBukkit) (#9922)
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:
fde5602a PR-927: Add PlayerRecipeBookSettingsChangeEvent
949ff217 PR-930: Add methods to get/set evoker fang attack delay
f6f7c79d SPIGOT-7514, PR-929: Add "Enchantment Roll" API to enchant items according to Minecraft mechanics
d40e22da PR-712: Add API to get full result of crafting items

CraftBukkit Changes:
c8feb0629 PR-1291: Improve precondition message in Entity#playEffect
482c56a00 PR-1285: Add PlayerRecipeBookSettingsChangeEvent
cdf798800 PR-1290: Add methods to get/set evoker fang attack delay
2c1b5f78f SPIGOT-7514, PR-1289: Add "Enchantment Roll" API to enchant items according to Minecraft mechanics
6aa644ae9 PR-992: Add API to get full result of crafting items
ffb1319bc PR-1287: Fix scoreboards not updating in Player#setStatistic
2023-11-11 12:25:45 -08:00

27 lines
1.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 2 May 2020 03:09:46 -0400
Subject: [PATCH] Validate PickItem Packet and kick for invalid
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 93b1e0b287d195181cb2253b3490ed537efa6b8e..c06ce8822891e7d2a8fa2b649b02555ce6e3373c 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -867,7 +867,14 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
@Override
public void handlePickItem(ServerboundPickItemPacket packet) {
PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
- this.player.getInventory().pickSlot(packet.getSlot());
+ // Paper start - validate pick item position
+ if (!(packet.getSlot() >= 0 && packet.getSlot() < this.player.getInventory().items.size())) {
+ ServerGamePacketListenerImpl.LOGGER.warn("{} tried to set an invalid carried item", this.player.getName().getString());
+ this.disconnect("Invalid hotbar selection (Hacking?)");
+ return;
+ }
+ this.player.getInventory().pickSlot(packet.getSlot()); // Paper - Diff above if changed
+ // Paper end
this.player.connection.send(new ClientboundContainerSetSlotPacket(-2, 0, this.player.getInventory().selected, this.player.getInventory().getItem(this.player.getInventory().selected)));
this.player.connection.send(new ClientboundContainerSetSlotPacket(-2, 0, packet.getSlot(), this.player.getInventory().getItem(packet.getSlot())));
this.player.connection.send(new ClientboundSetCarriedItemPacket(this.player.getInventory().selected));