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

Source

https://github.com/jeremyrsellars/CVE-2021-44228_scanner

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

Aims to find JndiLookup.class in nearly any directory or zip, jar, ear, war file, even deeply nested.

Readme

# File system scanner for CVE-2021-44228

Aims to find JndiLookup.class in nearly any directory or zip, jar, ear, war file, even deeply nested.

* [find-class-files](./find-class-files) – Clojure implementation should be able to run nearly anywhere Java can run, assuming there's enough disk space.
   * Given a set of file system roots (c:\my_dir or /home/home/on/the/range), shows instances of JndiLookup.class on the disk or in zips.
* [windows_cmd](./windows_cmd) – Prototype Windows scripts are batch files, but they're really slow and can get pretty verbose and they can't tell you the file hash.

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

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