Re: The Developer Implications of Windows XP SP2

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Date:         Thu, 13 Nov 2003 13:57:40 +0100
To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM

A smile a day...

>Additionally, Microsoft is working with microprocessor companies

> to help Windows support hardware-enforced "no execute" (or NX)

> on microprocessors that contain the feature. NX uses the CPU

> itself to enforce the separation of application code and data,

> preventing an application or Windows component from executing

> program code that an attacking worm or virus inserted into

> a portion of memory marked for data only.

Such a hardware feature has been introduced recently by intel, namely in the
80286 microprocessor. All Windows versions I am aware of already contain
provisions to *circumvent* this feature!

(Yes I know the original concept of the IA-32 Protected Mode -
segmentation - is incompatible with NT architecture, and that this is not
the most regrettable point where the NT design team chose not to use an
intel feature - ignoring rings 1 and 2 is).

Apart from this suave mockery I can only applaud this announcement and I
sincerely hope they found a way to implement this idea with current CPU's.

have fun

Robert Heinig

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• Previous message: BROWN Nick: "Re: Microsoft Security Bulletin MS03-049 - Installation problems?"
• Maybe in reply to: Michael Howard: "The Developer Implications of Windows XP SP2"
• Next in thread: Maxim S. Shatskih: "Re: The Developer Implications of Windows XP SP2"
• Reply: Maxim S. Shatskih: "Re: The Developer Implications of Windows XP SP2"
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