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

Source

https://github.com/snapattack/damn-vulnerable-log4j-app

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

Vulnerable web application to test CVE-2021-44228 / log4shell and forensic artifacts from an example attack

Readme

# SnapAttack Log4j / CVE-2021-44228 / log4shell Resources

## What's included?

### Damn Vulnerable Log4j App

[damn-vulnerable-log4j-app](damn-vulnerable-log4j-app) contains a basic vulnerable Java Servlet that logs the User Agent, HTTP GET and POST parameters with log4j.  It is packaged as a .war file and can be deployed to servers like Tomcat.  See the [README](damn-vulnerable-log4j-app/README.md) for more information.

<img src="dvlog4ja.png" width="450px" />



### Attack Artifacts

[attack-artifacts](attack-artifacts) contains example EDR, system, and application logs, as well as a PCAP and Zeek logs from an attack against a Windows victim machine. You can see the attack in our video at https://www.youtube.com/watch?v=X7cLgDoX6KU.  In the future, content like this will be freely available in the community edition of SnapAttack.  If you're interested, you can [request an invite](https://www.snapattack.com/request/invite).

![Artifacts](artifacts.jpg)

## License
All resources in this repository are provided under the [MIT License](LICENSE).

File Snapshot


 [4.0K]  /data/pocs/6604a25a0ef58934112751c772efe77afe7623be
├── [386K]  artifacts.jpg
├── [4.0K]  attack-artifacts
│   ├── [4.0K]  attacker
│   │   └── [ 13M]  kali.mp4
│   ├── [174K]  overview.jpg
│   ├── [1.3K]  README.md
│   └── [4.0K]  victim
│       ├── [4.0K]  logs
│       │   ├── [ 68K]  Application.evtx
│       │   ├── [ 15M]  Microsoft-Windows-PowerShell%4Operational.evtx
│       │   ├── [8.1M]  Microsoft-Windows-Sysmon%4Operational.evtx
│       │   ├── [2.1M]  Security.evtx
│       │   ├── [ 68K]  System.evtx
│       │   ├── [4.0K]  tomcat_webserver
│       │   │   ├── [8.0K]  localhost_access_log.2021-12-16.txt
│       │   │   └── [ 16K]  log4j.log
│       │   ├── [1.1M]  Windows PowerShell.evtx
│       │   └── [4.0K]  zeek
│       │       ├── [ 29K]  Win10Victim-438ccedb_conn.log
│       │       ├── [4.7K]  Win10Victim-438ccedb_dns.log
│       │       ├── [ 17K]  Win10Victim-438ccedb_files.log
│       │       ├── [ 12K]  Win10Victim-438ccedb_http.log
│       │       ├── [  90]  Win10Victim-438ccedb_packet_filter.log
│       │       ├── [2.5K]  Win10Victim-438ccedb_ssl.log
│       │       ├── [ 14K]  Win10Victim-438ccedb_weird.log
│       │       └── [ 16K]  Win10Victim-438ccedb_x509.log
│       ├── [ 26K]  process_list.csv
│       ├── [ 53K]  process_list.json
│       ├── [5.2K]  systeminfo.txt
│       ├── [9.2M]  Win10Victim.mp4
│       └── [4.4M]  Win10Victim.pcapng
├── [4.0K]  damn-vulnerable-log4j-app
│   ├── [4.0K]  damn-vulnerable-log4j-app-java17
│   │   ├── [1.3K]  nb-configuration.xml
│   │   ├── [4.4K]  pom.xml
│   │   └── [4.0K]  src
│   │       └── [4.0K]  main
│   │           ├── [4.0K]  java
│   │           │   └── [4.0K]  com
│   │           │       └── [4.0K]  snapattack
│   │           │           └── [4.0K]  dvlog4ja
│   │           │               ├── [ 240]  App.java
│   │           │               └── [1.1K]  RestAPI.java
│   │           ├── [4.0K]  resources
│   │           │   └── [4.0K]  META-INF
│   │           │       └── [ 425]  persistence.xml
│   │           └── [4.0K]  webapp
│   │               ├── [ 710]  index.html
│   │               ├── [4.0K]  META-INF
│   │               │   └── [  57]  context.xml
│   │               └── [4.0K]  WEB-INF
│   │                   ├── [ 308]  beans.xml
│   │                   ├── [4.0K]  classes
│   │                   │   └── [ 669]  log4j2.xml
│   │                   └── [ 401]  web.xml
│   ├── [4.0K]  damn-vulnerable-log4j-app-java8
│   │   ├── [1.9K]  nb-configuration.xml
│   │   ├── [3.0K]  pom.xml
│   │   └── [4.0K]  src
│   │       └── [4.0K]  main
│   │           ├── [4.0K]  java
│   │           │   └── [4.0K]  com
│   │           │       └── [4.0K]  snapattack
│   │           │           └── [4.0K]  dvlog4ja
│   │           │               ├── [ 236]  App.java
│   │           │               └── [1.1K]  RestAPI.java
│   │           ├── [4.0K]  resources
│   │           │   └── [4.0K]  META-INF
│   │           │       └── [ 425]  persistence.xml
│   │           └── [4.0K]  webapp
│   │               ├── [ 710]  index.html
│   │               ├── [4.0K]  META-INF
│   │               │   └── [  58]  context.xml
│   │               └── [4.0K]  WEB-INF
│   │                   ├── [ 308]  beans.xml
│   │                   ├── [4.0K]  classes
│   │                   │   └── [ 669]  log4j2.xml
│   │                   └── [ 883]  web.xml
│   └── [5.2K]  README.md
├── [112K]  dvlog4ja.png
├── [1.0K]  LICENSE
└── [1.0K]  README.md

33 directories, 49 files

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