Talk:Exec Shield

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Computer Security: Computing High‑importance

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Computing Mid‑importance

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I snipped this paragraph because it's influenced by my bias, although it IS true, and does show both that ES has something PaX found useful, and that PaX is more accurate than ES (which hence could lead to "better," and thus to manifesting my obvious bias that I keep trying to make sure doesn't crop up in these things).

Recent PaX revisions use a similar method inspired by Exec Shield with PAGEEXEC to avoid the excess overhead that the kernel assisted MMU walking imposes. PaX will fall back to kernel assisted MMU walking in the cases where Exec Shield would fail, at the cost of CPU overhead.

This isn't a quote, just my own explaination of what went on.

Removed quote

I removed the quote from the page; I haven't gotten permission for it, and didn't put my PD sig on until recently. I feel bad :(

To do

Implementation of PT_GNU_STACK and PT_GNU_HEAP binary markings and the deprecation of PT_GNU_HEAP are not yet covered here, nor is information on Exec Shield's minimal ASLR.

Poorly-worded introduction

Apparently Exec Shield installs an NX bit in x86 processors. Clearly this is impossible. Does it emulate one or enable the use of one? Someone in the know please update?

Kierenj 16:50, 3 November 2006 (UTC)[reply]

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