From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Nassim Jahnke Date: Thu, 4 Jan 2024 13:49:14 +0100 Subject: [PATCH] Validate ResourceLocation in NBT reading diff --git a/src/main/java/net/minecraft/nbt/NbtUtils.java b/src/main/java/net/minecraft/nbt/NbtUtils.java index 1d7c20fe14882fdeddf315a8923669e3385652f5..f88dd37783b3c155c23b547c360b8d3c16e030c0 100644 --- a/src/main/java/net/minecraft/nbt/NbtUtils.java +++ b/src/main/java/net/minecraft/nbt/NbtUtils.java @@ -149,8 +149,10 @@ public final class NbtUtils { if (!nbt.contains("Name", 8)) { return Blocks.AIR.defaultBlockState(); } else { - ResourceLocation resourceLocation = new ResourceLocation(nbt.getString("Name")); - Optional> optional = blockLookup.get(ResourceKey.create(Registries.BLOCK, resourceLocation)); + // Paper start - Validate resource location + ResourceLocation resourceLocation = ResourceLocation.tryParse(nbt.getString("Name")); + Optional> optional = resourceLocation != null ? blockLookup.get(ResourceKey.create(Registries.BLOCK, resourceLocation)) : Optional.empty(); + // Paper end - Validate resource location if (optional.isEmpty()) { return Blocks.AIR.defaultBlockState(); } else { diff --git a/src/main/java/net/minecraft/resources/ResourceLocation.java b/src/main/java/net/minecraft/resources/ResourceLocation.java index d93b623ce973b63d4f3a77bfe459f51af7cb3c1c..2c4553312f2f37f8613ac813708b4b95f9675e9f 100644 --- a/src/main/java/net/minecraft/resources/ResourceLocation.java +++ b/src/main/java/net/minecraft/resources/ResourceLocation.java @@ -37,6 +37,13 @@ public class ResourceLocation implements Comparable { private final String path; protected ResourceLocation(String namespace, String path, @Nullable ResourceLocation.Dummy extraData) { + // Paper start - Validate ResourceLocation + // Check for the max network string length (capped at Short.MAX_VALUE) as well as the max bytes of a StringTag (length written as an unsigned short) + final String resourceLocation = namespace + ":" + path; + if (resourceLocation.length() > Short.MAX_VALUE || io.netty.buffer.ByteBufUtil.utf8MaxBytes(resourceLocation) > 2 * Short.MAX_VALUE + 1) { + throw new ResourceLocationException("Resource location too long: " + resourceLocation); + } + // Paper end - Validate ResourceLocation this.namespace = namespace; this.path = path; } diff --git a/src/main/java/net/minecraft/world/RandomizableContainer.java b/src/main/java/net/minecraft/world/RandomizableContainer.java index 68fadc351464dde459eb4cc86660cf9add40d04e..a9a80f8bc4a6f250fe3c20482c395058f024fabd 100644 --- a/src/main/java/net/minecraft/world/RandomizableContainer.java +++ b/src/main/java/net/minecraft/world/RandomizableContainer.java @@ -50,7 +50,7 @@ public interface RandomizableContainer extends Container { default boolean tryLoadLootTable(CompoundTag nbt) { if (nbt.contains("LootTable", 8)) { - this.setLootTable(ResourceKey.create(Registries.LOOT_TABLE, new ResourceLocation(nbt.getString("LootTable")))); + this.setLootTable(net.minecraft.Optionull.map(ResourceLocation.tryParse(nbt.getString("LootTable")), rl -> ResourceKey.create(Registries.LOOT_TABLE, rl))); // Paper - Validate ResourceLocation if (this.lootableData() != null && this.getLootTable() != null) this.lootableData().loadNbt(nbt); // Paper - LootTable API if (nbt.contains("LootTableSeed", 4)) { this.setLootTableSeed(nbt.getLong("LootTableSeed")); diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java index 8c7cc9c5af0b8d8bef9b6e2d3d3e723cd76f3212..56b51096ca4147363a843accf6ef2510f05e8f1a 100644 --- a/src/main/java/net/minecraft/world/entity/EntityType.java +++ b/src/main/java/net/minecraft/world/entity/EntityType.java @@ -623,7 +623,7 @@ public class EntityType implements FeatureElement, EntityTypeT } public static Optional> by(CompoundTag nbt) { - return BuiltInRegistries.ENTITY_TYPE.getOptional(new ResourceLocation(nbt.getString("id"))); + return BuiltInRegistries.ENTITY_TYPE.getOptional(ResourceLocation.tryParse(nbt.getString("id"))); // Paper - Validate ResourceLocation } @Nullable diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java index b7af45eac986097ef53fa90bb4edd67f8829f13c..958b25e62b040943c346114ef19d56104ae0a844 100644 --- a/src/main/java/net/minecraft/world/entity/LivingEntity.java +++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java @@ -911,12 +911,13 @@ public abstract class LivingEntity extends Entity implements Attackable { if (nbt.contains("SleepingX", 99) && nbt.contains("SleepingY", 99) && nbt.contains("SleepingZ", 99)) { BlockPos blockposition = new BlockPos(nbt.getInt("SleepingX"), nbt.getInt("SleepingY"), nbt.getInt("SleepingZ")); - + if (this.position().distanceToSqr(blockposition.getX(), blockposition.getY(), blockposition.getZ()) < 16 * 16) { // Paper - The sleeping pos will always also set the actual pos, so a desync suggests something is wrong this.setSleepingPos(blockposition); this.entityData.set(LivingEntity.DATA_POSE, Pose.SLEEPING); if (!this.firstTick) { this.setPosToBed(blockposition); } + } // Paper - The sleeping pos will always also set the actual pos, so a desync suggests something is wrong } if (nbt.contains("Brain", 10)) { diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java index 5581fd6656fc13ea1d036d6caab2aba39c5320ac..748a6d81f409cf91a7aa2c88ded04f1d428cf0f6 100644 --- a/src/main/java/net/minecraft/world/entity/Mob.java +++ b/src/main/java/net/minecraft/world/entity/Mob.java @@ -645,7 +645,7 @@ public abstract class Mob extends LivingEntity implements EquipmentUser, Targeti this.setLeftHanded(nbt.getBoolean("LeftHanded")); if (nbt.contains("DeathLootTable", 8)) { - this.lootTable = ResourceKey.create(Registries.LOOT_TABLE, new ResourceLocation(nbt.getString("DeathLootTable"))); + this.lootTable = net.minecraft.Optionull.map(ResourceLocation.tryParse(nbt.getString("DeathLootTable")), rl -> ResourceKey.create(Registries.LOOT_TABLE, rl)); // Paper - Validate ResourceLocation this.lootTableSeed = nbt.getLong("DeathLootTableSeed"); } diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java index f1bf129aecb6840d79c537338e4057557f07790b..5bc4ba7c055992a32197db96d86a3906c11900d8 100644 --- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java +++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java @@ -561,7 +561,7 @@ public abstract class AbstractArrow extends Projectile { this.setCritArrow(nbt.getBoolean("crit")); this.setPierceLevel(nbt.getByte("PierceLevel")); if (nbt.contains("SoundEvent", 8)) { - this.soundEvent = (SoundEvent) BuiltInRegistries.SOUND_EVENT.getOptional(new ResourceLocation(nbt.getString("SoundEvent"))).orElse(this.getDefaultHitGroundSoundEvent()); + this.soundEvent = (SoundEvent) BuiltInRegistries.SOUND_EVENT.getOptional(ResourceLocation.tryParse(nbt.getString("SoundEvent"))).orElse(this.getDefaultHitGroundSoundEvent()); // Paper - Validate resource location } this.setShotFromCrossbow(nbt.getBoolean("ShotFromCrossbow")); diff --git a/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java b/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java index d976a6e3a79a01392a5033b05864d82782a30916..845eff7401b811c179dc9dee70eca0d724be5c80 100644 --- a/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java +++ b/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java @@ -73,7 +73,7 @@ public interface ContainerEntity extends Container, MenuProvider { default void readChestVehicleSaveData(CompoundTag nbt, HolderLookup.Provider registriesLookup) { this.clearItemStacks(); if (nbt.contains("LootTable", 8)) { - this.setLootTable(ResourceKey.create(Registries.LOOT_TABLE, new ResourceLocation(nbt.getString("LootTable")))); + this.setLootTable(net.minecraft.Optionull.map(ResourceLocation.tryParse(nbt.getString("LootTable")), rl -> ResourceKey.create(Registries.LOOT_TABLE, rl))); // Paper - Validate ResourceLocation // Paper start - LootTable API if (this.getLootTable() != null) { this.lootableData().loadNbt(nbt); diff --git a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java index f40b2582d9087f9dbb5cab950304698f33fdd879..a99fe191c429bb528209dd0f31b509acf9cccbb5 100644 --- a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java +++ b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java @@ -295,7 +295,12 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit while (iterator.hasNext()) { String s = (String) iterator.next(); - this.recipesUsed.put(new ResourceLocation(s), nbttagcompound1.getInt(s)); + // Paper start - Validate ResourceLocation + final ResourceLocation resourceLocation = ResourceLocation.tryParse(s); + if (resourceLocation != null) { + this.recipesUsed.put(resourceLocation, nbttagcompound1.getInt(s)); + } + // Paper end - Validate ResourceLocation } // Paper start - cook speed multiplier API diff --git a/src/main/java/net/minecraft/world/level/block/entity/BrushableBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BrushableBlockEntity.java index f78a9698afc87408fc46de2d3d00c923500885f4..dc02a3d84b397f634f77f4df9c06e245cc4dcb75 100644 --- a/src/main/java/net/minecraft/world/level/block/entity/BrushableBlockEntity.java +++ b/src/main/java/net/minecraft/world/level/block/entity/BrushableBlockEntity.java @@ -202,7 +202,7 @@ public class BrushableBlockEntity extends BlockEntity { private boolean tryLoadLootTable(CompoundTag nbt) { if (nbt.contains("LootTable", 8)) { - this.lootTable = ResourceKey.create(Registries.LOOT_TABLE, new ResourceLocation(nbt.getString("LootTable"))); + this.lootTable = net.minecraft.Optionull.map(ResourceLocation.tryParse(nbt.getString("LootTable")), rl -> ResourceKey.create(Registries.LOOT_TABLE, rl)); // Paper - Validate ResourceLocation this.lootTableSeed = nbt.getLong("LootTableSeed"); return true; } else {