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https://github.com/BX-Team/DivineMC.git
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754d2a5c94
Upstream has released updates that appear to apply and compile correctly Purpur Changes: PurpurMC/Purpur@6f5bbae5 [ci/skip] move some code around PurpurMC/Purpur@5c1a9835 fix issue with `shift-right-click-repairs-mending-points` PurpurMC/Purpur@3156e446 check damage value of tool correctly PurpurMC/Purpur@a9fe4f25 Updated Upstream (Paper)
35 lines
1.9 KiB
Diff
35 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: NONPLAYT <76615486+NONPLAYT@users.noreply.github.com>
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Date: Sat, 1 Feb 2025 19:28:34 +0300
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Subject: [PATCH] Block Log4Shell exploit
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diff --git a/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 376ae7bde8fdf0efed5a7d33f67a1a5ae3b5e6e7..ce8255db82335255313e16b9811bdfc39d33e5ee 100644
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--- a/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -2482,6 +2482,7 @@ public class ServerGamePacketListenerImpl
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}
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private void tryHandleChat(String message, Runnable handler, boolean sync) { // CraftBukkit
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+ if (ServerGamePacketListenerImpl.isLog4ShellExploit(message)) return; // DivineMC - Block Log4Shell exploit
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if (isChatMessageIllegal(message)) {
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this.disconnectAsync(Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper - add proper async disconnect
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} else if (this.player.isRemoved() || this.player.getChatVisibility() == ChatVisiblity.HIDDEN) { // CraftBukkit - dead men tell no tales
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@@ -2514,6 +2515,15 @@ public class ServerGamePacketListenerImpl
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}
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}
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+ // DivineMC start - Block Log4Shell exploit
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+ public static boolean isLog4ShellExploit(String message) {
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+ java.util.regex.Pattern pattern = java.util.regex.Pattern.compile(".*\\$\\{[^}]*}.*");
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+ java.util.regex.Matcher matcher = pattern.matcher(message);
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+
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+ return matcher.find();
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+ }
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+ // DivineMC end - Block Log4Shell exploit
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+
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public static boolean isChatMessageIllegal(String message) {
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for (int i = 0; i < message.length(); i++) {
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if (!StringUtil.isAllowedChatCharacter(message.charAt(i))) {
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