From 4eb0290bb40c1a5ca5ec27161c73d8965f062bb2 Mon Sep 17 00:00:00 2001
From: modmuss50 <modmuss50@gmail.com>
Date: Fri, 10 Dec 2021 10:59:14 +0000
Subject: [PATCH] Apply mitigation's against Log4J2 exploit CVE-2021-44228.

---
 .../loom/configuration/providers/LaunchProvider.java |  1 +
 src/main/resources/log4j2.fabric.xml                 | 12 ++++++------
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/main/java/net/fabricmc/loom/configuration/providers/LaunchProvider.java b/src/main/java/net/fabricmc/loom/configuration/providers/LaunchProvider.java
index 312492a..f033750 100644
--- a/src/main/java/net/fabricmc/loom/configuration/providers/LaunchProvider.java
+++ b/src/main/java/net/fabricmc/loom/configuration/providers/LaunchProvider.java
@@ -58,6 +58,7 @@ public class LaunchProvider extends DependencyProvider {
 				.property("fabric.development", "true")
 				.property("fabric.remapClasspathFile", getRemapClasspathFile().getAbsolutePath())
 				.property("log4j.configurationFile", getAllLog4JConfigFiles())
+				.property("log4j2.formatMsgNoLookups", "true")
 
 				.property("client", "java.library.path", getExtension().getMinecraftProvider().nativesDir().getAbsolutePath())
 				.property("client", "org.lwjgl.librarypath", getExtension().getMinecraftProvider().nativesDir().getAbsolutePath())
diff --git a/src/main/resources/log4j2.fabric.xml b/src/main/resources/log4j2.fabric.xml
index fcfd27b..69c9c0d 100644
--- a/src/main/resources/log4j2.fabric.xml
+++ b/src/main/resources/log4j2.fabric.xml
@@ -7,7 +7,7 @@
 			<PatternLayout>
 				<LoggerNamePatternSelector defaultPattern="%style{[%d{HH:mm:ss}]}{blue} %highlight{[%t/%level]}{FATAL=red, ERROR=red, WARN=yellow, INFO=green, DEBUG=green, TRACE=blue} %style{(%logger{1})}{cyan} %highlight{%msg%n}{FATAL=red, ERROR=red, WARN=normal, INFO=normal, DEBUG=normal, TRACE=normal}" disableAnsi="${sys:fabric.log.disableAnsi:-true}">
 					<!-- Dont show the logger name for minecraft classes-->
-					<PatternMatch key="net.minecraft.,com.mojang." pattern="%style{[%d{HH:mm:ss}]}{blue} %highlight{[%t/%level]}{FATAL=red, ERROR=red, WARN=yellow, INFO=green, DEBUG=green, TRACE=blue} %style{(Minecraft)}{cyan} %highlight{%msg%n}{FATAL=red, ERROR=red, WARN=normal, INFO=normal, DEBUG=normal, TRACE=normal}"/>
+					<PatternMatch key="net.minecraft.,com.mojang." pattern="%style{[%d{HH:mm:ss}]}{blue} %highlight{[%t/%level]}{FATAL=red, ERROR=red, WARN=yellow, INFO=green, DEBUG=green, TRACE=blue} %style{(Minecraft)}{cyan} %highlight{%msg{nolookups}%n}{FATAL=red, ERROR=red, WARN=normal, INFO=normal, DEBUG=normal, TRACE=normal}"/>
 				</LoggerNamePatternSelector>
 			</PatternLayout>
 		</Console>
@@ -15,9 +15,9 @@
 		<!--	Vanilla server gui	-->
 		<Queue name="ServerGuiConsole" ignoreExceptions="true">
 			<PatternLayout>
-				<LoggerNamePatternSelector defaultPattern="[%d{HH:mm:ss} %level] (%logger{1}) %msg%n">
+				<LoggerNamePatternSelector defaultPattern="[%d{HH:mm:ss} %level] (%logger{1}) %msg{nolookups}%n">
 					<!-- Dont show the logger name for minecraft classes-->
-					<PatternMatch key="net.minecraft.,com.mojang." pattern="[%d{HH:mm:ss} %level] %msg%n"/>
+					<PatternMatch key="net.minecraft.,com.mojang." pattern="[%d{HH:mm:ss} %level] %msg{nolookups}%n"/>
 				</LoggerNamePatternSelector>
 			</PatternLayout>
 		</Queue>
@@ -25,9 +25,9 @@
 		<!--	latest.log same as vanilla	-->
 		<RollingRandomAccessFile name="LatestFile" fileName="logs/latest.log" filePattern="logs/%d{yyyy-MM-dd}-%i.log.gz">
 			<PatternLayout>
-				<LoggerNamePatternSelector defaultPattern="[%d{HH:mm:ss}] [%t/%level] (%logger{1}) %msg%n">
+				<LoggerNamePatternSelector defaultPattern="[%d{HH:mm:ss}] [%t/%level] (%logger{1}) %msg{nolookups}%n">
 					<!-- Dont show the logger name for minecraft classes-->
-					<PatternMatch key="net.minecraft.,com.mojang." pattern="[%d{HH:mm:ss}] [%t/%level] (Minecraft) %msg%n"/>
+					<PatternMatch key="net.minecraft.,com.mojang." pattern="[%d{HH:mm:ss}] [%t/%level] (Minecraft) %msg{nolookups}%n"/>
 				</LoggerNamePatternSelector>
 			</PatternLayout>
 			<Policies>
@@ -38,7 +38,7 @@
 
 		<!--	Debug log file	-->
 		<RollingRandomAccessFile name="DebugFile" fileName="logs/debug.log" filePattern="logs/debug-%i.log.gz">
-			<PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level] (%logger) %msg%n" />
+			<PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level] (%logger) %msg{nolookups}%n" />
 
 			<!--	Keep 5 files max	-->
 			<DefaultRolloverStrategy max="5" fileIndex="min"/>