PaperMC/patches/server/0849-Do-not-accept-invalid-client-settings.patch
2022-12-08 11:06:54 -08:00

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1.4 KiB
Diff

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 acb4b6bb80b59af28ba3658c11096750dccb5056..29ba350b026f8bec0654ba1ee7f34d5aa5f1648b 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -3463,6 +3463,13 @@ 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);
}