Students from abroad can apply for student funds. A number of organisations are offering scholarships for stays in Germany and/or for the time shortly before graduation.
International full-time students can also apply for funds at one of HfK’s partner universities abroad. The same applies for internships in Europe.
See here: http://www.hfk-bremen.de/t/studium-und-praktikum-im-ausland/n/erasmus
Furthermore, there are aid funds which will support you should you find yourself in an emergency situation.