Hacker has two meanings: Traditionally, hackers like to tinker with software or electronic systems. Hackers enjoy exploring and learning how computer systems operate. They love discovering new ways to work — both mechanically and electronically. In recent years, hacker has taken on a new meaning — someone who maliciously breaks into systems for personal gain. … Read more
Session fixation vulnerabilities typically arise when an application creates an anonymous session for each user when they first access the application. If the application contains a login function, this anonymous session will be created prior to login and then upgraded to an authenticated one after they have logged in. The same token that initially confers … Read more
The topic of code injection is a huge one, encompassing dozens of different languages and environments, and a wide variety of different attacks. It would be possible to write an entire book on any one of these areas, exploring all of the theoretical subtleties of how vulnerabilities can arise and be exploited. Because this is … Read more
Some applications use elaborate login mechanisms involving multiple stages. For example: ■ Entry of a username and password. ■ A challenge for specific digits from a PIN or a memorable word. ■ The submission of a value displayed on a changing physical token. Multistage login mechanisms are designed to provide enhanced security over the simple … Read more