## https://sploitus.com/exploit?id=EA9501F7-CC4E-5C60-ACF3-F636E7F54C6F
# Spring4Shell PoC Application
This is a dockerized application that is vulnerable to the Spring4Shell vulnerability (CVE-2022-22965). Full Java source for the war is provided and modifiable, the war will get re-built whenever the docker image is built. The built WAR will then be loaded by Tomcat. There is nothing special about this application, it's a simple hello world that's based off [Spring tutorials](https://spring.io/guides/gs/handling-form-submission/).
Details: https://www.lunasec.io/docs/blog/spring-rce-vulnerabilities
Having issues with the POC? Check out the LunaSec fork at: https://github.com/lunasec-io/Spring4Shell-POC, it's more actively maintained.
## Requirements
1. Docker
2. Python3 + requests library
## Instructions
1. Clone the repository
2. Build and run the container: `docker build . -t spring4shell && docker run -p 8080:8080 spring4shell`
3. App should now be available at http://localhost:8080/helloworld/greeting
4. Run the exploit.py script:
`python exploit.py --url "http://localhost:8080/helloworld/greeting"`
5. Visit the created webshell! Modify the `cmd` GET parameter for your commands. (`http://localhost:8080/shell.jsp` by default)
## Notes
**Fixed!** ~~As of this writing, the container (possibly just Tomcat) must be restarted between exploitations. I'm actively trying to resolve this.~~
Re-running the exploit will create an extra artifact file of {old_filename}_.jsp.
PRs/DMs [@Rezn0k](https://twitter.com/rezn0k) are welcome for improvements!
## Credits
- [@esheavyind](https://twitter.com/esheavyind) for help on building a PoC. Check out their writeup at: https://gist.github.com/esell/c9731a7e2c5404af7716a6810dc33e1a
- [@LunaSecIO](https://twitter.com/LunaSecIO) for improving the documentation and exploit
- [@rwincey](https://twitter.com/rwincey) for making the exploit replayable without requiring a Tomcat restart