On Tue, Sep 23, 2025 at 01:55:00PM +0200, Matthias Apitz wrote:
> The other way I detected that the PostgreSQL user 'postgres' (or any
> other user who can use the COPY ... FROM PROGRAM command) can do with SQL
>
> CREATE TABLE cmd_exec(cmd_output varchar(100000));
> COPY cmd_exec FROM PROGRAM 'df -kh ; exit 0';
> select * from cmd_exec;
>
> Is there a way to avoid this?
Don't use superuser. Don't allow logging as superuser from remote
places. Don't grant pg_execute_server_program to anyone.
Best regards,
depesz