From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf 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 15694736c7ee8836355409e0046e221ebdb7e524..a7fe72d745625951172a8fdf9a4689b5bf540445 100644 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java @@ -3590,6 +3590,13 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic @Override public void handleClientInformation(ServerboundClientInformationPacket packet) { PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel()); + // Paper start - do not accept invalid information + if (packet.viewDistance() < 0) { + LOGGER.warn("Disconnecting " + this.player.getScoreboardName() + " for invalid view distance: " + packet.viewDistance()); + this.disconnect("Invalid client settings", PlayerKickEvent.Cause.ILLEGAL_ACTION); + return; + } + // Paper end - do not accept invalid information this.player.updateOptions(packet); }