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

Source

https://github.com/0xThiebaut/CVE-2021-44228

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 Response Scripts

Readme

# CVE-2021-44228
This repository contains **altered** community scripts related to CVE-2021-44228 ported to EDR environments.
The scripts were modified to be compatible with other technologies' additional requirements.

See the linked repositories for an up-to-date and original version of the modified scripts.

## Palo Alto's Cortex XDR
_All the following scripts have been rendered compatible by implementing incompatible Python modules and exposing an `xdr` entry point.
Documentation regarding the `xdr` function's expected input and outputs can be found in each script._

- **[fox-it/log4j-finder](https://github.com/fox-it/log4j-finder) by NCC Group / Fox-IT / Research and Intelligence Fusion Team (RIFT)**
  
  Scan the filesystem to find Log4j2 files that is vulnerable to Log4Shell (CVE-2021-44228).
  It scans recursively both on disk and inside Java Archive files (JARs).

- **[Neo23x0/log4shell-detector](https://github.com/Neo23x0/log4shell-detector) by Florian Roth**

  Checks local log files for indicators of exploitation attempts, even heavily obfuscated ones that string or regular expression based patterns wouldn't detect.

File Snapshot


 [4.0K]  /data/pocs/35ef602ea2e1f8a8625dfc6b42ca674c4d7dd92f
├── [9.6K]  log4j-finder.py
├── [ 32K]  log4shell-detector.py
└── [1.1K]  README.md

0 directories, 3 files

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