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CVE-2021-44228 PoC — Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints

Source
Associated Vulnerability
Title:Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints (CVE-2021-44228)
Description:Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
Description
demo project to highlight how to execute the log4j (CVE-2021-44228) vulnerability
Readme
# log4j-CVE-2021-44228-test
demo projects to highlight how to execute the log4j (CVE-2021-44228) vulnerability

used spring boot just to be quickly set up. you'll have to excuse all the hard coding, it was just a POC.

## Usage
Have Java 8 installed. Build using maven ```mvn clean package -DskipTests```. Run these commands in separate shell windows:
```shell
java -jar vulnerable-server/target/vulnerable-server.jar
java -jar malicious-server/target/malicious-server.jar
curl http://localhost:8880/victimLDAP
curl http://localhost:8880/victimRMI
```

This should execute the code in the Exploit class (which will just open up the calculator)
File Snapshot

[4.0K] /data/pocs/e4a0fecd4ac147c25753a4209ce6fd46bbf2fbd6 ├── [4.0K] malicious-server │   ├── [1.9K] pom.xml │   └── [4.0K] src │   └── [4.0K] main │   ├── [4.0K] java │   │   ├── [4.0K] com │   │   │   └── [4.0K] kossatzd │   │   │   ├── [3.7K] MaliciousApplication.java │   │   │   └── [ 957] MaliciousController.java │   │   └── [ 675] Exploit.java │   └── [4.0K] resources │   └── [ 16] application.properties ├── [ 536] pom.xml ├── [ 644] README.md └── [4.0K] vulnerable-server ├── [1.9K] pom.xml └── [4.0K] src └── [4.0K] main ├── [4.0K] java │   └── [4.0K] com │   └── [4.0K] kossatzd │   ├── [ 630] VulnerableApplication.java │   └── [ 647] VulnerableController.java └── [4.0K] resources └── [ 16] application.properties 14 directories, 11 files
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