Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Thu, 24 Nov 2011 10:57:44 -0700
From: Kurt Seifried <>
Subject: Re: CVE request -- kernel: kvm: device assignment

On 11/24/2011 10:49 AM, Petr Matousek wrote:
> It was found that kvm_vm_ioctl_assign_device function did not check if
> the user requesting assignment was privileged or not. Together with
> /dev/kvm being 666, unprivileged user could assign unused pci devices,
> or even devices that were in use and whose resources were not properly
> claimed by the respective drivers.
> Please note that privileged access was still needed to re-program the
> device to for example issue DMA requests. This is typically achieved by
> touching files on sysfs filesystem. These files are usually not
> accessible to unprivileged users.
> As a result, local user could use this flaw to crash the system.
> Reference:
> Thanks,
Please use CVE-2011-4347 for this issue.


-Kurt Seifried / Red Hat Security Response Team

Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.