One of the most common security vulnerabilities in Windows software is the buffer overrun exploit. It works by feeding a well crafted data stream into a program that uses a stack based buffer without correctly checking the length of the data stream. By writing past the end of the buffer the overwrite can: Store malicious assembler instructions in the stack’s memory pages Change the current function’s return address on the stack so that the malicious ...

Tip #1: Be Aware of PNG Limitations in Internet Explorer The Portable Network Graphic (PNG) format is well supported by modern browsers (e.g. IE 6+, Firefox 1+ and Opera 5+), except for two issues with Internet Explorer: Graphics tools like Adobe Photoshop save a Gamma correction table in the PNG file that is designed to allow for differences in the brightness of displays. Unlike other browsers, IE uses this table to adjust the brightness of ...