<i>&quot;The buffer overflow has long been a feature of the computer security landscape. In fact the first self-propagating Internet worm—1988&#x27;s Morris Worm—used a buffer overflow in the Unix finger daemon to spread from machine to machine.&quot;</i><p>I thought the daemon exploited was sendmail? ... quick search later ... so the fingerd was used. Good explanation here: ~ Eugene H. Spafford, <i>&quot;The Internet Worm Program: An Analysis&quot;</i> <a href="http:&#x2F;&#x2F;spaf.cerias.purdue.edu&#x2F;tech-reps&#x2F;823.pdf" rel="nofollow">http:&#x2F;&#x2F;spaf.cerias.purdue.edu&#x2F;tech-reps&#x2F;823.pdf</a>