AMD64 Buffer Overflow Protection

Posted by muesli in Tech & Net
Sunday, January 18. 2004

Infoworld has a story on AMD64 buffer overflow protection, which currently works with Windows XP's SP2.

Like almost all processors, AMD's chips detect buffer overflows and trigger an overflow exception that crashes an application or operating system, said John Crank, Athlon 64 product manager. But AMD's chips take the additional step of designating any code that enters the processor after the overflow exception is triggered as nonexecutable, he said. Otherwise, if the overflow exception was caused by a malicious attack, rather than a programming error, the new code can open the way for the attacker to place software programs known as "trojans" inside the PC, giving that attacker control of the PC, Crank said.

If something similiar gets implemented in the Linux kernel, this would really improve a server's security.

Awaiting mine!

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