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 a47393f9776763015de522859dc0f206b93b3a98..889013ceacbd107faff11611ac902a9d4f2b8dab 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 b98f9246b60daf31460f41ce214dfa7c011f5684..842b0cec0397d7ae5166617627340ffac0e35db1 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(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/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java index 278e22985ecda6653ce01a29209eb51506c48438..474868d362d855423f74fd604c1050cf33ba27f3 100644 --- a/src/main/java/net/minecraft/world/entity/LivingEntity.java +++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java @@ -887,11 +887,13 @@ 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 cf1f6a0081f0dbcf43842ec23accf6c3ae9b79d8..58ff5b4df2124901df757315e42b2490a7da7415 100644 --- a/src/main/java/net/minecraft/world/entity/Mob.java +++ b/src/main/java/net/minecraft/world/entity/Mob.java @@ -603,7 +603,7 @@ 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 = ResourceKey.create(Registries.LOOT_TABLE, ResourceLocation.parse(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 10d30304c8c89b1f2a55be8529035311d1424e44..ddf47dab1ab92c45e3eea09239d418a9798ed59e 100644 --- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java +++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java @@ -649,7 +649,7 @@ 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 ccc7367ab2740bea0f2b907223a0920b11665092..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, 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 // 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 65ab9b22f724877b68f4f25aad2831e2cb080b19..730aca233f6e7564d4cb85b5b628d23c4f01d2f4 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(ResourceLocation.parse(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 32de29c385c784ab87e29b2e072f3992386cd775..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, 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 {