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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
47 lines
3.1 KiB
Diff
47 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
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Date: Fri, 3 Dec 2021 16:55:50 -0500
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Subject: [PATCH] Sanitize sent BlockEntity NBT
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diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java
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index d79284a790569141c2ac8178d6ecc20b17cdd0d3..3944852921335c78a04a9dc301882ab5b152b1ed 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java
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@@ -17,7 +17,7 @@ public class ClientboundBlockEntityDataPacket implements Packet<ClientGamePacket
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private final CompoundTag tag;
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public static ClientboundBlockEntityDataPacket create(BlockEntity blockEntity, Function<BlockEntity, CompoundTag> nbtGetter) {
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- return new ClientboundBlockEntityDataPacket(blockEntity.getBlockPos(), blockEntity.getType(), nbtGetter.apply(blockEntity));
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+ return new ClientboundBlockEntityDataPacket(blockEntity.getBlockPos(), blockEntity.getType(), blockEntity.sanitizeSentNbt(nbtGetter.apply(blockEntity))); // Paper - Sanitize sent data
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}
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public static ClientboundBlockEntityDataPacket create(BlockEntity blockEntity) {
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diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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index f47eeb70661661610ef1a96dd9da67785825c126..89e3163b0301f8414c9400a6e00cdd85841fe2e8 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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@@ -152,6 +152,7 @@ public class ClientboundLevelChunkPacketData {
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CompoundTag compoundTag = blockEntity.getUpdateTag();
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BlockPos blockPos = blockEntity.getBlockPos();
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int i = SectionPos.sectionRelative(blockPos.getX()) << 4 | SectionPos.sectionRelative(blockPos.getZ());
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+ blockEntity.sanitizeSentNbt(compoundTag); // Paper - Sanitize sent data
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return new ClientboundLevelChunkPacketData.BlockEntityInfo(i, blockPos.getY(), blockEntity.getType(), compoundTag.isEmpty() ? null : compoundTag);
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}
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}
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diff --git a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
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index 4893eaf93738da860014ddf3ad003334c9ebc9fa..20201430ee8f28245aa845acb172d0f5d80458ff 100644
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--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
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+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
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@@ -253,4 +253,11 @@ public abstract class BlockEntity {
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return null;
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}
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// CraftBukkit end
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+ // Paper start - Sanitize sent data
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+ public CompoundTag sanitizeSentNbt(CompoundTag tag) {
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+ tag.remove("PublicBukkitValues");
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+
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+ return tag;
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+ }
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+ // Paper end - Sanitize sent data
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}
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