Re: [bitfolk] CVE-2009-2692 - local->root Linux kernel explo…

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Author: Andy Smith
Date:  
To: users
Subject: Re: [bitfolk] CVE-2009-2692 - local->root Linux kernel exploit

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gpg: Signature made Wed Aug 19 13:36:51 2009 UTC using DSA key ID BF15490B
gpg: Good signature from "Andy Smith <andy@strugglers.net>"
gpg: aka "Andrew James Smith <andy@strugglers.net>"
gpg: aka "Andy Smith (UKUUG) <andy.smith@ukuug.org>"
gpg: aka "Andy Smith (BitFolk Ltd.) <andy@bitfolk.com>"
gpg: aka "Andy Smith (Linux User Groups UK) <andy@lug.org.uk>"
gpg: aka "Andy Smith (Cernio Technology Cooperative) <andy.smith@cernio.com>"
Hi Tony,

On Wed, Aug 19, 2009 at 02:28:11PM +0100, Tony Whitmore wrote:
>
> On Wed, 19 Aug 2009 12:15:44 +0000, Andy Smith <andy@???> wrote:
> > But on a reboot, Xen never actually destroys the virtual machine, it
> > just starts it again. That means it will have the same kernel
> > (pygrub is never run), same amount of RAM, most probably the same
> > size disk devices as well (I have never tested that bit).
>
> Does that apply for domUs virtualised under HVM too? I thought a reboot on
> an HVM domU went all the way back to the BIOS.


Ah, this I do not know as I've only ever used Xen in
paravirtualisation mode. It wouldn't surprise me if they behaved
differently.

All BitFolk VPSes are currently PV-mode Xen domUs.

Cheers,
Andy

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