Break-in lowlight

A host at school, running FreeBSD, which I installed, was broken into by a script kiddie. Most assumably, the break-in was performed using an exploitable bug in the telnet daemon of free BSD systems (netkit-telnetd), which is often running on GNU/Linux systems as well.

I am not trying to hide this break-in act. I believe in and support being open regarding such information, being valuable to many.
I am not emberassed in it. Yes, a system I installed was broken into by a script kiddie with no security knowledge beside running pre-made code that exploits known vulnerabilities. That system was a host I installed to test various things with FreeBSD. It did not have any importance besides that to the school network or any other resource, nor did it have any trust by other systems or valuable information. I did not attempt to secure it, and if I would choose to run a production mission on it, I would have reinstalled it at the time of that choice, with far more security considerations.

The netkit-telnetd bug which I am assuming was exploited to break into that system, is a known problem, which have been announced as important at FreeBSD's headquarter site, as well as on various security related mailing lists. and I was aware of it before it was exploited on that system, I do not recall if firstly from a thread in the bugtraq mailing list, from a post in the debian-security-announce mailing list, or firstly from FreeBSD's site. On a production/sensitive system, I would most probably have been able to take action before any attack.

The offender script kiddie should probably be more ashamed, with childish actions and over-pride (as seen in files left by him on the system) of such a break-in.

If any mention exists to the break in to a production user server by the same script kiddie, I am not trying to hide that action (and its success) either. That was the first time a system I administered was broken in to. The system was reinstalled from scratch, with only previous content restored being users' data from a backup. As the first case of a break-in to a system I was responsible to, I can say I learned from it both in awareness and technical experience, and that system is set up in a more secure manner now.
I was emberassed in it, yes. But I am not trying to hide it, and can say I have learned from it, and improved that system's security after the reinstall.


Tom Alsberg

$Id: breakin.html,v 1.5 2004/03/13 15:42:42 alsbergt Exp $