Scissors/patches/server/0003-UUID-validation.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Video <videogamesm12@gmail.com>
Date: Sat, 12 Mar 2022 19:34:59 -0700
Subject: [PATCH] UUID validation


diff --git a/src/main/java/net/minecraft/nbt/NbtUtils.java b/src/main/java/net/minecraft/nbt/NbtUtils.java
index 6dac24354192bea79a4b9eb721543110826790b2..a9c3c55eb622b18c74d8a9bd472e4e871d11b2aa 100644
--- a/src/main/java/net/minecraft/nbt/NbtUtils.java
+++ b/src/main/java/net/minecraft/nbt/NbtUtils.java
@@ -78,7 +78,11 @@ public final class NbtUtils {
         }
         // Paper start - support string UUID's
         if (nbt.contains("Id", 8)) {
-            uUID = UUID.fromString(nbt.getString("Id"));
+            // Scissors start - Validate String UUIDs in game profiles
+            try {
+                uUID = UUID.fromString(nbt.getString("Id"));
+            } catch (Exception ignored) {}
+            // Scissors end
         }
         // Paper end
 
diff --git a/src/main/java/net/minecraft/network/chat/HoverEvent.java b/src/main/java/net/minecraft/network/chat/HoverEvent.java
index 3ad05bbab726c59e7b67d9614af4b208d4520cb3..c0633f9553fb5aa52e8ffc863159521d09cb3bd5 100644
--- a/src/main/java/net/minecraft/network/chat/HoverEvent.java
+++ b/src/main/java/net/minecraft/network/chat/HoverEvent.java
@@ -174,7 +174,14 @@ public class HoverEvent {
             } else {
                 JsonObject jsonObject = json.getAsJsonObject();
                 EntityType<?> entityType = BuiltInRegistries.ENTITY_TYPE.get(new ResourceLocation(GsonHelper.getAsString(jsonObject, "type")));
-                UUID uUID = UUID.fromString(GsonHelper.getAsString(jsonObject, "id"));
+                // Scissors start
+                UUID uUID;
+                try {
+                    uUID = UUID.fromString(GsonHelper.getAsString(jsonObject, "id"));
+                } catch (Exception ex) {
+                    return null;
+                }
+                // Scissors end
                 Component component = Component.Serializer.fromJson(jsonObject.get("name"));
                 return new HoverEvent.EntityTooltipInfo(entityType, uUID, component);
             }
@@ -186,7 +193,14 @@ public class HoverEvent {
                 CompoundTag compoundTag = TagParser.parseTag(text.getString());
                 Component component = Component.Serializer.fromJson(compoundTag.getString("name"));
                 EntityType<?> entityType = BuiltInRegistries.ENTITY_TYPE.get(new ResourceLocation(compoundTag.getString("type")));
-                UUID uUID = UUID.fromString(compoundTag.getString("id"));
+                // Scissors start
+                UUID uUID;
+                try {
+                    uUID = UUID.fromString(compoundTag.getString("id"));
+                } catch (Exception ex) {
+                    return null;
+                }
+                // Scissors end
                 return new HoverEvent.EntityTooltipInfo(entityType, uUID, component);
             } catch (Exception var5) {
                 return null;