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Allow enabling sand duping (#10191)

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Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.
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Owen 2024-03-03 17:05:34 -05:00 • committed by GitHub
parent b21eb4d9a4
commit 89d51d5f29
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673 changed files with 157 additions and 189 deletions
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patches/server/0881-Fix-cmd-permission-levels-for-command-blocks.patch Normal file
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@ -0,0 +1,90 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 24 Jan 2022 15:32:02 -0800
Subject: [PATCH] Fix cmd permission levels for command blocks
diff --git a/src/main/java/net/minecraft/commands/CommandSourceStack.java b/src/main/java/net/minecraft/commands/CommandSourceStack.java
index 907bc9d84dbc98427384cf529bfde4b09d8ce8ca..faa375f2722793a86265248a4be4fa14736d9818 100644
--- a/src/main/java/net/minecraft/commands/CommandSourceStack.java
+++ b/src/main/java/net/minecraft/commands/CommandSourceStack.java
@@ -204,10 +204,29 @@ public class CommandSourceStack implements ExecutionCommandSource<CommandSourceS
return this.permissionLevel >= level;
}
+ // Paper start - Fix permission levels for command blocks
+ private boolean forceRespectPermissionLevel() {
+ return this.source == CommandSource.NULL || (this.source instanceof final net.minecraft.world.level.BaseCommandBlock commandBlock && commandBlock.getLevel().paperConfig().commandBlocks.forceFollowPermLevel);
+ }
+ // Paper end - Fix permission levels for command blocks
+
// CraftBukkit start
public boolean hasPermission(int i, String bukkitPermission) {
- // World is null when loading functions
- return ((this.getLevel() == null || !this.getLevel().getCraftServer().ignoreVanillaPermissions) && this.permissionLevel >= i) || this.getBukkitSender().hasPermission(bukkitPermission);
+ // Paper start - Fix permission levels for command blocks
+ final java.util.function.BooleanSupplier hasBukkitPerm = () -> this.source == CommandSource.NULL /*treat NULL as having all bukkit perms*/ || this.getBukkitSender().hasPermission(bukkitPermission); // lazily check bukkit perms to the benefit of custom permission setups
+ // if the server is null, we must check the vanilla perm level system
+ // if ignoreVanillaPermissions is true, we can skip vanilla perms and just run the bukkit perm check
+ //noinspection ConstantValue
+ if (this.getServer() == null || !this.getServer().server.ignoreVanillaPermissions) { // server & level are null for command function loading
+ final boolean hasPermLevel = this.permissionLevel >= i;
+ if (this.forceRespectPermissionLevel()) { // NULL CommandSource and command blocks (if setting is enabled) should always pass the vanilla perm check
+ return hasPermLevel && hasBukkitPerm.getAsBoolean();
+ } else { // otherwise check vanilla perm first then bukkit perm, matching upstream behavior
+ return hasPermLevel || hasBukkitPerm.getAsBoolean();
+ }
+ }
+ return hasBukkitPerm.getAsBoolean();
+ // Paper end - Fix permission levels for command blocks
}
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
index dd7c1ac97505ce7a846aa8ee91bb654d060acc1a..df06c28c778255cb2d8d5e14960bd38a2af9ad22 100644
--- a/src/main/java/net/minecraft/commands/Commands.java
+++ b/src/main/java/net/minecraft/commands/Commands.java
@@ -296,16 +296,7 @@ public class Commands {
String[] args = command.split(" ");
if (args.length == 0) return; // Paper - empty commands shall not be dispatched
- String cmd = args[0];
- if (cmd.startsWith("minecraft:")) cmd = cmd.substring("minecraft:".length());
- if (cmd.startsWith("bukkit:")) cmd = cmd.substring("bukkit:".length());
-
- // Block disallowed commands
- if (cmd.equalsIgnoreCase("stop") || cmd.equalsIgnoreCase("kick") || cmd.equalsIgnoreCase("op")
- || cmd.equalsIgnoreCase("deop") || cmd.equalsIgnoreCase("ban") || cmd.equalsIgnoreCase("ban-ip")
- || cmd.equalsIgnoreCase("pardon") || cmd.equalsIgnoreCase("pardon-ip") || cmd.equalsIgnoreCase("reload")) {
- return;
- }
+ // Paper - Fix permission levels for command blocks
// Handle vanilla commands;
if (sender.getLevel().getCraftServer().getCommandBlockOverride(args[0])) {
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java b/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java
index 48b4fe75a7f881e7713885d79d4ef5ec7b574a2d..88b00556322f078b8a9d28fb7c759bb8c84bfcf0 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/MinecartCommandBlock.java
@@ -136,7 +136,7 @@ public class MinecartCommandBlock extends AbstractMinecart {
@Override
public CommandSourceStack createCommandSourceStack() {
- return new CommandSourceStack(this, MinecartCommandBlock.this.position(), MinecartCommandBlock.this.getRotationVector(), this.getLevel(), 2, this.getName().getString(), MinecartCommandBlock.this.getDisplayName(), this.getLevel().getServer(), MinecartCommandBlock.this);
+ return new CommandSourceStack(this, MinecartCommandBlock.this.position(), MinecartCommandBlock.this.getRotationVector(), this.getLevel(), this.getLevel().paperConfig().commandBlocks.permissionsLevel, this.getName().getString(), MinecartCommandBlock.this.getDisplayName(), this.getLevel().getServer(), MinecartCommandBlock.this); // Paper - configurable command block perm level
}
@Override
diff --git a/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java
index 167f334eec90417eba05fcecec21435415771df7..f08c77e20462bada221b5ed395ceb2f7d39ee7c0 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/CommandBlockEntity.java
@@ -54,7 +54,7 @@ public class CommandBlockEntity extends BlockEntity {
public CommandSourceStack createCommandSourceStack() {
Direction enumdirection = (Direction) CommandBlockEntity.this.getBlockState().getValue(CommandBlock.FACING);
- return new CommandSourceStack(this, Vec3.atCenterOf(CommandBlockEntity.this.worldPosition), new Vec2(0.0F, enumdirection.toYRot()), this.getLevel(), 2, this.getName().getString(), this.getName(), this.getLevel().getServer(), (Entity) null);
+ return new CommandSourceStack(this, Vec3.atCenterOf(CommandBlockEntity.this.worldPosition), new Vec2(0.0F, enumdirection.toYRot()), this.getLevel(), this.getLevel().paperConfig().commandBlocks.permissionsLevel, this.getName().getString(), this.getName(), this.getLevel().getServer(), (Entity) null); // Paper - configurable command block perm level
}
@Override