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https://github.com/PaperMC/Paper.git
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89d51d5f29
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.
59 lines
3.8 KiB
Diff
59 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Mon, 3 Apr 2023 08:55:52 +0100
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Subject: [PATCH] Prevent causing expired keys from impacting new joins
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diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundPlayerInfoUpdatePacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundPlayerInfoUpdatePacket.java
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index 0e54e8faa48751a651b953bec72543a94edf74bc..d43106eb89b14667e85cd6e8fa047d64f2e8ec87 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundPlayerInfoUpdatePacket.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundPlayerInfoUpdatePacket.java
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@@ -96,7 +96,13 @@ public class ClientboundPlayerInfoUpdatePacket implements Packet<ClientGamePacke
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INITIALIZE_CHAT((serialized, buf) -> {
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serialized.chatSession = buf.readNullable(RemoteChatSession.Data::read);
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}, (buf, entry) -> {
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- buf.writeNullable(entry.chatSession, RemoteChatSession.Data::write);
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+ // Paper start - Prevent causing expired keys from impacting new joins
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+ RemoteChatSession.Data chatSession = entry.chatSession;
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+ if (chatSession != null && chatSession.profilePublicKey().hasExpired()) {
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+ chatSession = null;
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+ }
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+ buf.writeNullable(chatSession, RemoteChatSession.Data::write);
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+ // Paper end - Prevent causing expired keys from impacting new joins
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}),
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UPDATE_GAME_MODE((serialized, buf) -> {
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serialized.gameMode = GameType.byId(buf.readVarInt());
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index c9dab47fe3db73b31b40e071d37f1be63401c19d..69118af2a873f23f6543676db39263bfeb81b4f1 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -286,6 +286,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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private int knownMovePacketCount;
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@Nullable
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private RemoteChatSession chatSession;
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+ private boolean hasLoggedExpiry = false; // Paper - Prevent causing expired keys from impacting new joins
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private SignedMessageChain.Decoder signedMessageDecoder;
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private final LastSeenMessagesValidator lastSeenMessages = new LastSeenMessagesValidator(20);
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private final MessageSignatureCache messageSignatureCache = MessageSignatureCache.createDefault();
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@@ -394,6 +395,13 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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this.disconnect(Component.translatable("multiplayer.disconnect.idling"), org.bukkit.event.player.PlayerKickEvent.Cause.IDLING); // Paper - kick event cause
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}
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+ // Paper start - Prevent causing expired keys from impacting new joins
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+ if (!hasLoggedExpiry && this.chatSession != null && this.chatSession.profilePublicKey().data().hasExpired()) {
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+ LOGGER.info("Player profile key for {} has expired!", this.player.getName().getString());
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+ hasLoggedExpiry = true;
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+ }
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+ // Paper end - Prevent causing expired keys from impacting new joins
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+
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}
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public void resetPosition() {
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@@ -3337,6 +3345,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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private void resetPlayerChatState(RemoteChatSession session) {
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this.chatSession = session;
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+ this.hasLoggedExpiry = false; // Paper - Prevent causing expired keys from impacting new joins
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this.signedMessageDecoder = session.createMessageDecoder(this.player.getUUID());
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this.chatMessageChain.append(() -> {
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this.player.setChatSession(session);
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