log4j-scan: automated, accurate, and extensive scanner for finding vulnerable log4j
A fully automated, accurate, and extensive scanner for finding vulnerable log4j hosts.
- Support for lists of URLs.
- Fuzzing for more than 60 HTTP request headers (not only 3-4 headers as previously seen tools).
- Fuzzing for HTTP POST Data parameters.
- Fuzzing for JSON data parameters.
- Supports DNS callback for vulnerability discovery and validation.
- WAF Bypass payloads.
There is a patch bypass on Log4J v2.15.0 that allows a full RCE. FullHunt added community support for log4j-scan to reliably detect CVE-2021-45046. If you’re having difficulty discovering and scanning your infrastructure at scale or keeping up with the Log4J threat, please get in touch at (email@example.com).
We have been researching the Log4J RCE (CVE-2021-44228) since it was released, and we worked in preventing this vulnerability with our customers. We are open-sourcing an open detection and scanning tool for discovering and fuzzing for Log4J RCE CVE-2021-44228 vulnerability. This shall be used by security teams to scan their infrastructure for Log4J RCE, and also test for WAF bypasses that can result in achieving code execution on the organization’s environment.
It supports DNS OOB callbacks out of the box, there is no need to set up a DNS callback server.
$ git clone https://github.com/fullhunt/log4j-scan.git
$ pip3 install -r requirements.txt
Scan a Single URL
$ python3 log4j-scan.py -u https://log4j.lab.secbot.local
Scan a Single URL using all Request Methods: GET, POST (url-encoded form), POST (JSON body)
$ python3 log4j-scan.py -u https://log4j.lab.secbot.local --run-all-tests
Discover WAF bypasses on the environment.
$ python3 log4j-scan.py -u https://log4j.lab.secbot.local --waf-bypass
Scan a list of URLs
$ python3 log4j-scan.py -l urls.txt
This project is made for educational and ethical testing purposes only. Usage of log4j-scan for attacking targets without prior mutual consent is illegal. It is the end user’s responsibility to obey all applicable local, state, and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program.
Copyright (c) 2021 Mazin Ahmed