From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf <Spottedleaf@users.noreply.github.com> Date: Sat, 7 May 2022 14:58:53 -0700 Subject: [PATCH] Do not accept invalid client settings diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java index ab0a3fed682f6b2cd5e60224c3a0d2a55c69efe8..ac87735ff07ee0833727cdf8b62f443ce16a3216 100644 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java @@ -3312,6 +3312,13 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl @Override public void handleClientInformation(ServerboundClientInformationPacket packet) { PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel()); + // Paper start - do not accept invalid information + if (packet.information().viewDistance() < 0) { + LOGGER.warn("Disconnecting " + this.player.getScoreboardName() + " for invalid view distance: " + packet.information().viewDistance()); + this.disconnect("Invalid client settings", org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_ACTION); + return; + } + // Paper end - do not accept invalid information this.player.updateOptions(packet.information()); this.connection.channel.attr(io.papermc.paper.adventure.PaperAdventure.LOCALE_ATTRIBUTE).set(net.kyori.adventure.translation.Translator.parseLocale(packet.information().language())); // Paper }