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From fbcfb4bcbf57547d045729d75dac619eacc7b088 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sat, 12 Nov 2016 23:25:22 -0600
Subject: [PATCH] Filter bad data from ArmorStand and SpawnEgg items
diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index 4ca44afa9..dcf64efcc 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -385,4 +385,12 @@ public class PaperWorldConfig {
private void removeCorruptTEs() {
removeCorruptTEs = getBoolean("remove-corrupt-tile-entities", false);
}
+
+ public boolean filterNBTFromSpawnEgg = true;
+ private void fitlerNBTFromSpawnEgg() {
+ filterNBTFromSpawnEgg = getBoolean("filter-nbt-data-from-spawn-eggs-and-related", true);
+ if (!filterNBTFromSpawnEgg) {
+ Bukkit.getLogger().warning("Spawn Egg and Armor Stand NBT filtering disabled, this is a potential security risk");
+ }
+ }
}
diff --git a/src/main/java/net/minecraft/server/EntityFallingBlock.java b/src/main/java/net/minecraft/server/EntityFallingBlock.java
index 8059e6dcd..a4f465e38 100644
--- a/src/main/java/net/minecraft/server/EntityFallingBlock.java
+++ b/src/main/java/net/minecraft/server/EntityFallingBlock.java
@@ -251,6 +251,14 @@ public class EntityFallingBlock extends Entity {
this.block = Block.getById(nbttagcompound.getByte("Tile") & 255).fromLegacyData(i);
}
+ // Paper start - Block FallingBlocks with Command Blocks
+ // Check mappings on update - dc = "repeating_command_block" - dd = "chain_command_block"
+ final Block b = this.block.getBlock();
+ if (this.world.paperConfig.filterNBTFromSpawnEgg && (b == Blocks.COMMAND_BLOCK || b == Blocks.dc || b == Blocks.dd)) {
+ this.block = Blocks.STONE.getBlockData();
+ }
+ // Paper end
+
this.ticksLived = nbttagcompound.getInt("Time");
Block block = this.block.getBlock();
diff --git a/src/main/java/net/minecraft/server/ItemMonsterEgg.java b/src/main/java/net/minecraft/server/ItemMonsterEgg.java
index 1a01a57d2..f914ad417 100644
--- a/src/main/java/net/minecraft/server/ItemMonsterEgg.java
+++ b/src/main/java/net/minecraft/server/ItemMonsterEgg.java
@@ -102,7 +102,14 @@ public class ItemMonsterEgg extends Item {
NBTTagCompound nbttagcompound1 = entity.e(new NBTTagCompound());
UUID uuid = entity.getUniqueID();
- nbttagcompound1.a(nbttagcompound.getCompound("EntityTag"));
+ // Paper start - Filter out position and motion information
+ final NBTTagCompound entityTag = nbttagcompound.getCompound("EntityTag");
+ if (world.paperConfig.filterNBTFromSpawnEgg) {
+ entityTag.remove("Pos");
+ entityTag.remove("Motion");
+ }
+ nbttagcompound1.a(entityTag);
+ // Paper end
entity.a(uuid);
entity.f(nbttagcompound1);
}
--
2.12.2.windows.2
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