Positive Technologies, a security firm based in Moscow, reported on Friday that it has uncovered a hole in the Data Execution Protection (DEP) security measures in Microsoft Windows XP Service Pack 2. Microsoft touted the DEP as a key development in the security updates of SP2 before it was released in August of 2004. DEP is designed to prevent hackers from tricking the operating system into running a program loaded surreptitiously into the computer's memory (usually via buffer overrun). In a report called "Defeating Microsoft Windows XP SP2 Heap protection and DEP bypass," Positive Technologies said that it found two...