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 f3b11b08358fdd93464cd19b05047e10727a5799..c192ddee39afe1de0b5454bc94593b10fefbb24d 100644 --- a/src/main/java/net/minecraft/nbt/NbtUtils.java +++ b/src/main/java/net/minecraft/nbt/NbtUtils.java @@ -222,8 +222,10 @@ 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 3908f88959e43d2f485d5f239257e6564dbda6cd..b549f65d0e276a5ed5b8b2f6956268d05910724f 100644 --- a/src/main/java/net/minecraft/resources/ResourceLocation.java +++ b/src/main/java/net/minecraft/resources/ResourceLocation.java @@ -33,6 +33,13 @@ 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/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java index 8ba573bb4099ee5b27b61f333e72d794c48d5f29..69bdf3f2ee731e59e8d454816a9ca72cb49c0fe0 100644 --- a/src/main/java/net/minecraft/world/entity/EntityType.java +++ b/src/main/java/net/minecraft/world/entity/EntityType.java @@ -614,7 +614,7 @@ 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 bb52d084637c97d9cc1ebaeec28358a0ddb3952b..40e21effc948b02874a6ed1d1c340c4dc87579d6 100644 --- a/src/main/java/net/minecraft/world/entity/LivingEntity.java +++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java @@ -879,12 +879,13 @@ 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 f7818fd5e59784554732c39ef5c56461ea0d62c4..11c933a662c2275e2ef239cb0b5dd2480cc55490 100644 --- a/src/main/java/net/minecraft/world/entity/Mob.java +++ b/src/main/java/net/minecraft/world/entity/Mob.java @@ -608,7 +608,7 @@ public abstract class Mob extends LivingEntity implements Targeting { this.setLeftHanded(nbt.getBoolean("LeftHanded")); if (nbt.contains("DeathLootTable", 8)) { - this.lootTable = new ResourceLocation(nbt.getString("DeathLootTable")); + this.lootTable = ResourceLocation.tryParse(nbt.getString("DeathLootTable")); // 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 c30f19162e33dbe8f018b7dc66210681b6027389..e8faca6e443239968f0111519f9e5cd018ed3297 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 f4ad1eea5bced6997edbc3a5ed1360b12b70f68f..648eefb973a4e5e543818c417a6ee39f283ea361 100644 --- a/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java +++ b/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java @@ -66,7 +66,7 @@ public interface ContainerEntity extends Container, MenuProvider { default void readChestVehicleSaveData(CompoundTag nbt) { this.clearItemStacks(); if (nbt.contains("LootTable", 8)) { - this.setLootTable(new ResourceLocation(nbt.getString("LootTable"))); + this.setLootTable(ResourceLocation.tryParse(nbt.getString("LootTable"))); // Paper - Validate ResourceLocation this.setLootTableSeed(nbt.getLong("LootTableSeed")); } ContainerHelper.loadAllItems(nbt, this.getItemStacks()); // Paper - always load the items, table may still remain 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 d04fc84eef11adb5ea64077f48794b6ed7fb3ada..89d06253b00604114e543ebbe12a9993ae95dc41 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 @@ -290,7 +290,12 @@ 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 b5b1831631e233a96b6fd55972a8862b0f420da8..3f62e823bf9b5aa696e3c240613a0fb50340875e 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 @@ -199,7 +199,7 @@ public class BrushableBlockEntity extends BlockEntity { private boolean tryLoadLootTable(CompoundTag nbt) { if (nbt.contains("LootTable", 8)) { - this.lootTable = new ResourceLocation(nbt.getString("LootTable")); + this.lootTable = ResourceLocation.tryParse(nbt.getString("LootTable")); // Paper - Validate ResourceLocation this.lootTableSeed = nbt.getLong("LootTableSeed"); return true; } else {