Messages in this thread | | | Date | Wed, 22 May 2013 22:36:51 +0200 | From | Paolo Bonzini <> | Subject | Re: PING^7 (was Re: [PATCH v2 00/14] Corrections and customization of the SG_IO command whitelist (CVE-2012-4542)) |
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Il 22/05/2013 22:19, Theodore Ts'o ha scritto: > On Wed, May 22, 2013 at 09:37:54PM +0200, Paolo Bonzini wrote: >>> If it's not theoretical, how does the cloud service control who has >>> access to the CD burner, and how are the disks loaded into the CD >>> burner? >> >> CD burning would be used in a VM that runs on your local workstation, so >> the VM gets access to the CD burner under your desk. There was also a >> developer of a CD burning tool that wanted to test it inside BSD, >> Solaris and Windows VMs; the idea is the same. > > So in both cases all of the VM's and the host OS are within the same > trust boundary. This simplifies the security requirements than in the > more generic cloud server caser where the VM's are mutually > suspicious. This simplifies the requirements of what we need to push > into the kernel, yes?
What do you mean by "push into the kernel"?
(Anyway the CD burner case is really the only one that the current whitelist covers completely. I was just listing it as a use case for SG_IO in the context as virtualization).
Paolo
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