"Malicious hackers recently began seeding Internet news groups that traffic in pornography with JPEG images that take advantage of a security hole in Microsoft's software. Users who unwittingly downloaded the poison images could have had remote-control software installed on their computers that gives remote attackers total control over the machines."


http://story.news.yahoo.com/news?tmpl=story&u=/ttpcworld/20041025/tc_techtues_pcworld/118210&cid=1740&ncid=1729