    sentence 1: The firsi-. vulnerability’ 1S a. buffer  wverrun that results-from |E 'g failure, to” properly  Jeteimine- an ,object” type retumed from a Webby    server.   sentence 2: First UP. » Microsoft said.2 buffer  overrun vulnerability ‘ocours ‘because JE .does..not}  properly determine an. object-type retuned froma  ‘Websserver i “=a 5