CVE-2021-44228 - Apache log4j RCE quick test

Overview

Build

./build.sh

Start log4j RCE Server

./start-log4j-rce-server.sh

Test

  • Run java -cp log4j-rce-1.0-SNAPSHOT-all.jar log4j Check if you get logs in hack.log from current folder
  • You can change this line
    String[] cmds = { "sh", "-c", "echo 'Exploit at '" + getDateString() + " >> ./hack.log" };
    in file apache-log4j-poc/src/main/java/Exploit.java to whatever you like then rebuild and run test
  • Check out issue #1 if you see maven compile error

Credits

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Comments
  • example worked,  minor patch for compilation failure

    example worked, minor patch for compilation failure

    this example worked as expected

    execute build.sh, the following part

    cd apache-log4j-poc mvn clean package

    encounter BUILD FAILURE

    [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project log4j-rce: Compilation failure: Compilation failure: [ERROR] Source option 5 is no longer supported. Use 6 or later. [ERROR] Target option 1.5 is no longer supported. Use 1.6 or later. [ERROR] -> [Help 1]

    check https://stackoverflow.com/questions/53034953/error-source-option-5-is-no-longer-supported-use-6-or-later-on-maven-compile fixed compilation by adding the following code in apache-log4j-poc/pom.xml

    <properties>
       <maven.compiler.source>6</maven.compiler.source>
       <maven.compiler.target>1.6</maven.compiler.target>
     </properties>
    
    opened by lidingpku 1
Owner
Jeffrey Li
Jeffrey Li
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