Snow Leopard security - The good, the bad and the missing

Apple Engineers missed a key opportunity to implement an industry-standard technology in their latest operating system that would have made it more resistant to hacking attacks, three researchers have said.

Known as ASLR, or address space layout randomization, the measure picks a different memory location to load system components each time the OS is started. While Microsoft has had it implemented since the roll-out of Windows Vista, the analogous protection in Snow Leopard, which went on sale Friday, suffers from a crucial deficiency: It fails to randomize core parts of the OS, including the heap, stack and dynamic linker.