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https://github.com/PaperMC/Paper.git
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94 lines
6.2 KiB
Diff
94 lines
6.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Nassim Jahnke <nassim@njahnke.dev>
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Date: Thu, 4 Jan 2024 13:49:14 +0100
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Subject: [PATCH] Validate ResourceLocation in NBT reading
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diff --git a/src/main/java/net/minecraft/nbt/NbtUtils.java b/src/main/java/net/minecraft/nbt/NbtUtils.java
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index 18fad4f083862ace2bc56579883f548f6d697091..8e68a094a22243f3e84110ddf81136219ac1de7c 100644
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--- a/src/main/java/net/minecraft/nbt/NbtUtils.java
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+++ b/src/main/java/net/minecraft/nbt/NbtUtils.java
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@@ -230,8 +230,10 @@ public final class NbtUtils {
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if (!nbt.contains("Name", 8)) {
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return Blocks.AIR.defaultBlockState();
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} else {
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- ResourceLocation resourceLocation = new ResourceLocation(nbt.getString("Name"));
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- Optional<? extends Holder<Block>> optional = blockLookup.get(ResourceKey.create(Registries.BLOCK, resourceLocation));
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+ // Paper start - Validate resource location
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+ ResourceLocation resourceLocation = ResourceLocation.tryParse(nbt.getString("Name"));
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+ Optional<? extends Holder<Block>> optional = resourceLocation != null ? blockLookup.get(ResourceKey.create(Registries.BLOCK, resourceLocation)) : Optional.empty();
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+ // Paper end - Validate resource location
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if (optional.isEmpty()) {
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return Blocks.AIR.defaultBlockState();
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} else {
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diff --git a/src/main/java/net/minecraft/resources/ResourceLocation.java b/src/main/java/net/minecraft/resources/ResourceLocation.java
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index 38e2a8cec48bc779b8154d6d719031f457a2403e..4379090b74d156b62b88163a234c22e78454f5e4 100644
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--- a/src/main/java/net/minecraft/resources/ResourceLocation.java
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+++ b/src/main/java/net/minecraft/resources/ResourceLocation.java
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@@ -31,6 +31,13 @@ public class ResourceLocation implements Comparable<ResourceLocation> {
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private final String path;
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protected ResourceLocation(String namespace, String path, @Nullable ResourceLocation.Dummy extraData) {
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+ // Paper start - Validate ResourceLocation
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+ // 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)
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+ final String resourceLocation = namespace + ":" + path;
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+ if (resourceLocation.length() > Short.MAX_VALUE || io.netty.buffer.ByteBufUtil.utf8MaxBytes(resourceLocation) > 2 * Short.MAX_VALUE + 1) {
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+ throw new ResourceLocationException("Resource location too long: " + resourceLocation);
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+ }
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+ // Paper end - Validate ResourceLocation
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this.namespace = namespace;
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this.path = path;
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}
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diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java
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index d362a06d0600003d40f632eac602ff552cafb9da..081937597a8984b52a1e92d4c6032c04c942116e 100644
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--- a/src/main/java/net/minecraft/world/entity/EntityType.java
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+++ b/src/main/java/net/minecraft/world/entity/EntityType.java
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@@ -618,7 +618,7 @@ public class EntityType<T extends Entity> implements FeatureElement, EntityTypeT
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}
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public static Optional<EntityType<?>> by(CompoundTag nbt) {
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- return BuiltInRegistries.ENTITY_TYPE.getOptional(new ResourceLocation(nbt.getString("id")));
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+ return BuiltInRegistries.ENTITY_TYPE.getOptional(ResourceLocation.tryParse(nbt.getString("id"))); // Paper - Validate ResourceLocation
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}
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@Nullable
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diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
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index 42e2be9286b75a1d34845f303ffc65e96fdd5416..0b5334004b9d0489e8465824870662b467ce321b 100644
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--- a/src/main/java/net/minecraft/world/entity/Mob.java
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+++ b/src/main/java/net/minecraft/world/entity/Mob.java
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@@ -620,7 +620,7 @@ public abstract class Mob extends LivingEntity implements Targeting {
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this.setLeftHanded(nbt.getBoolean("LeftHanded"));
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if (nbt.contains("DeathLootTable", 8)) {
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- this.lootTable = new ResourceLocation(nbt.getString("DeathLootTable"));
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+ this.lootTable = ResourceLocation.tryParse(nbt.getString("DeathLootTable")); // Paper - Validate ResourceLocation
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this.lootTableSeed = nbt.getLong("DeathLootTableSeed");
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}
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diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
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index 6272b0e1e332789b983a486ee25226e2a1c9fdda..505fe5496044f090ce6f7d541b8c3e13c567b16d 100644
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--- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
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+++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java
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@@ -560,7 +560,7 @@ public abstract class AbstractArrow extends Projectile {
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this.setCritArrow(nbt.getBoolean("crit"));
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this.setPierceLevel(nbt.getByte("PierceLevel"));
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if (nbt.contains("SoundEvent", 8)) {
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- this.soundEvent = (SoundEvent) BuiltInRegistries.SOUND_EVENT.getOptional(new ResourceLocation(nbt.getString("SoundEvent"))).orElse(this.getDefaultHitGroundSoundEvent());
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+ this.soundEvent = (SoundEvent) BuiltInRegistries.SOUND_EVENT.getOptional(ResourceLocation.tryParse(nbt.getString("SoundEvent"))).orElse(this.getDefaultHitGroundSoundEvent()); // Paper - Validate resource location
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}
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this.setShotFromCrossbow(nbt.getBoolean("ShotFromCrossbow"));
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diff --git a/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java b/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java
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index 7529751afa2932fd16bc4591189b0358268a7b14..e2e1c7a017e82dc7299e5cd1783818e4f0319c0b 100644
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--- a/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/vehicle/ContainerEntity.java
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@@ -67,7 +67,7 @@ public interface ContainerEntity extends Container, MenuProvider {
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default void readChestVehicleSaveData(CompoundTag nbt) {
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this.clearItemStacks();
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if (nbt.contains("LootTable", 8)) {
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- this.setLootTable(new ResourceLocation(nbt.getString("LootTable")));
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+ this.setLootTable(ResourceLocation.tryParse(nbt.getString("LootTable"))); // Paper - Validate ResourceLocation
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this.setLootTableSeed(nbt.getLong("LootTableSeed"));
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}
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