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https://github.com/BX-Team/DivineMC.git
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9aa8f44b16
Upstream has released updates that appear to apply and compile correctly Purpur Changes: PurpurMC/Purpur@c4a6f63 Updated Upstream (Paper) PurpurMC/Purpur@568a028 Updated Upstream (Paper)
48 lines
2.8 KiB
Diff
48 lines
2.8 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: Thu, 23 May 2024 02:06:30 +0300
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Subject: [PATCH] Block Log4Shell exploit
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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 50b4e3fb244b8bac1a6a6d90aaf3b4be075b2500..4e844772b0343633ba44299544e77c012a1de888 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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@@ -2424,6 +2424,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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}
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private void tryHandleChat(String s, Runnable runnable, boolean sync) { // CraftBukkit
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+ if (ServerGamePacketListenerImpl.isLog4ShellExploit(s)) return; // DivineMC - Block Log4Shell exploit
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if (ServerGamePacketListenerImpl.isChatMessageIllegal(s)) {
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this.disconnect((Component) Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper
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} else if (this.player.isRemoved() || this.player.getChatVisibility() == ChatVisiblity.HIDDEN) { // CraftBukkit - dead men tell no tales
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@@ -2455,6 +2456,15 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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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
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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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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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index 37fc08d04ff3514d27ad25c8d774a6e96b30c3b1..3ab958a84a8f13eeaa5f3d6003d1d389fccd5384 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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@@ -751,6 +751,8 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
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Preconditions.checkArgument(msg != null, "msg cannot be null");
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if (this.getHandle().connection == null) return;
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+
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+ if (ServerGamePacketListenerImpl.isLog4ShellExploit(msg)) return; // DivineMC - Block Log4Shell exploit
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// Paper start - Improve chat handling
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if (ServerGamePacketListenerImpl.isChatMessageIllegal(msg)) {
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