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 4929bac8e476664086470f078efce6c0a6164413..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 = ResourceLocation.parse(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 87afe84791af2d5e9f869cd4c09eed4bb5fee75b..1967c43ee3a12e63365cc40ee6565307e2fd73cf 100644 --- a/src/main/java/net/minecraft/resources/ResourceLocation.java +++ b/src/main/java/net/minecraft/resources/ResourceLocation.java @@ -41,6 +41,13 @@ public final class ResourceLocation implements Comparable { assert isValidPath(path); + // 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 084935138b1484f3d96e99f4e5655a6c04931907..9e357abe13f55bd9ce3a1d5348bcf19a15ea5433 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, ResourceLocation.parse(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 d036b02af0a4f63bd1e4e306f1ecd102b3d991fb..97ad6cd38adbe8a7b2ea6e2a5a339bd67b81b5bd 100644 --- a/src/main/java/net/minecraft/world/entity/EntityType.java +++ b/src/main/java/net/minecraft/world/entity/EntityType.java @@ -690,7 +690,7 @@ public class EntityType implements FeatureElement, EntityTypeT } public static Optional> by(CompoundTag nbt) { - return BuiltInRegistries.ENTITY_TYPE.getOptional(ResourceLocation.parse(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/Leashable.java b/src/main/java/net/minecraft/world/entity/Leashable.java index 1a6448cccf79a94013f9f44c3067d91da3da1f7e..06af888e4c3d9d01a462b487742b597184a7a8a6 100644 --- a/src/main/java/net/minecraft/world/entity/Leashable.java +++ b/src/main/java/net/minecraft/world/entity/Leashable.java @@ -55,7 +55,13 @@ public interface Leashable { @Nullable default Leashable.LeashData readLeashData(CompoundTag nbt) { if (nbt.contains("leash", 10)) { - return new Leashable.LeashData(Either.left(nbt.getCompound("leash").getUUID("UUID"))); + // Paper start + final CompoundTag leashTag = nbt.getCompound("leash"); + if (!leashTag.hasUUID("UUID")) { + return null; + } + return new Leashable.LeashData(Either.left(leashTag.getUUID("UUID"))); + // Paper end } else { if (nbt.contains("leash", 11)) { Either either = (Either) NbtUtils.readBlockPos(nbt, "leash").map(Either::right).orElse(null); // CraftBukkit - decompile error diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java index 1c4ec3857c5c3ecf58f842292c280a4a1f00a04c..7196340fefd95845f290329faef489f2b2626ecb 100644 --- a/src/main/java/net/minecraft/world/entity/LivingEntity.java +++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java @@ -911,11 +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 8a0e65ac8318a467996f48b423db1ac621359fbe..aad63549d7c4f501b683b8dead4938eac27895eb 100644 --- a/src/main/java/net/minecraft/world/entity/Mob.java +++ b/src/main/java/net/minecraft/world/entity/Mob.java @@ -601,7 +601,7 @@ public abstract class Mob extends LivingEntity implements EquipmentUser, Leashab this.leashData = this.readLeashData(nbt); this.setLeftHanded(nbt.getBoolean("LeftHanded")); if (nbt.contains("DeathLootTable", 8)) { - this.lootTable = Optional.of(ResourceKey.create(Registries.LOOT_TABLE, ResourceLocation.parse(nbt.getString("DeathLootTable")))); + this.lootTable = Optional.ofNullable(ResourceLocation.tryParse(nbt.getString("DeathLootTable"))).map((rs) -> ResourceKey.create(Registries.LOOT_TABLE, rs)); // 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 75cc3db39c974abab8510af4a633fc6812efc647..14e31ae88e90d8ea1a98800cc6c1c3527bb2ed6b 100644 --- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java +++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java @@ -695,7 +695,7 @@ 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(ResourceLocation.parse(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 } if (nbt.contains("item", 10)) { 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 874a44ab77248665c2db243764e8542bfc0d6514..cc7826a10f22e3307231d887db2fee98063b1f46 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 registries) { this.clearItemStacks(); if (nbt.contains("LootTable", 8)) { - this.setContainerLootTable(ResourceKey.create(Registries.LOOT_TABLE, ResourceLocation.parse(nbt.getString("LootTable")))); + this.setContainerLootTable(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.getContainerLootTable() != 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 b1067a3add5dc0cfa853b02b5b556d6d67e2932a..15e0861486a2bda3e2f4049b1b5a299c870acd31 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 @@ -180,7 +180,11 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit while (iterator.hasNext()) { String s = (String) iterator.next(); - this.recipesUsed.put(ResourceKey.create(Registries.RECIPE, ResourceLocation.parse(s)), nbttagcompound1.getInt(s)); + // Paper start - Validate ResourceLocation + final ResourceLocation resourceLocation = ResourceLocation.tryParse(s); + if (resourceLocation != null) { + this.recipesUsed.put(ResourceKey.create(Registries.RECIPE, resourceLocation), nbttagcompound1.getInt(s)); + } } // 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 1bfffbf54b1b440c6e19a908ea2bd70387d06b5c..b08867878e56f88569d547765f29cab018a9e791 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 @@ -194,7 +194,7 @@ public class BrushableBlockEntity extends BlockEntity { private boolean tryLoadLootTable(CompoundTag nbt) { if (nbt.contains("LootTable", 8)) { - this.lootTable = ResourceKey.create(Registries.LOOT_TABLE, ResourceLocation.parse(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 {