While many companies have already updated their OpenSSL installations to prevent cybercriminals from stealing their customers information by exploiting the Heartbleed bug, there are a number of services that are still vulnerable.
Experts at the University of Michigan have been monitoring Heartbleed attacks and vulnerable websites with the aid of ZMap, an open-source network scanner that can be used to perform Internet-wide network studies.
Shortly after news of Heartbleed came to ligh…