Re: [Qemu-devel] chroot jailing...

["immersive.excel@gmail.com" <immersive.excel@gmail.com>]

Thanks!

So it sounds like you're saying selinux is the only meaningful thing to try?
Or do people ever bother to place qemu in chroot jails??

I seem to have gotten the impression that people use qemu-static to do this,
but it appears to be more for offering secured access of a guest folder
to the host OS;
not so much for security...

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On 01/12/2014 11:11 PM, Stefan Hajnoczi wrote:
> On Sun, Jan 12, 2014 at 02:17:43PM -0500, immersive.excel@gmail.com wrote:
>> Would there be any security benefits, without suffering any considerable
>> relative loss in performance, to (chroot) jailing qemu? Can it,
>> practically speaking, be done?? Would that be a partial safeguard
>> against virtual machine escapes? Or is it the case that if a virtual
>> machine escape takes place, then all bets are probably off? (i.e., you
>> probably have already pole-vaulted over any filesystem driver/partition
>> access control mechanisms...) Are there any articles or discussions that
>> I can be directed to about it? (my focus for now is 64 bit, Intel core
>> i7...) Are there specific suggestions and/or guidelines for attempting
>> to do so -or not??
> Isolating QEMU can be useful to prevent exposing data on the host or
> from other guests.
>
> Production systems using libvirt often run QEMU unprivileged and use
> SELinux to restrict what resources the process has access to.  This way
> a QEMU process that has been taken over still cannot get access to much
> besides the files it already has open, the network device it uses, etc.
>
> Stefan