Vulnerability CVE-2011-2512
Published: 2012-06-21

Description:
The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbitrary code via a negative number in the Queue Notify field of the Virtio Header, which bypasses a signed comparison.

CVSS2 => (AV:A/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.8/10
6.4/10
6.5/10
Exploit range
Attack complexity
Authentication
Adjacent network
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Kvm group -> Qemu-kvm 

 References:
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commitdiff;h=7157e2e23e89adcd436caeab31fdd6b47eded377
http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html
http://rhn.redhat.com/errata/RHSA-2011-0919.html
http://ubuntu.com/usn/usn-1165-1
http://www.openwall.com/lists/oss-security/2011/06/28/13
http://www.openwall.com/lists/oss-security/2011/06/29/15
https://hermes.opensuse.org/messages/9605323
https://www.debian.org/security/2011/dsa-2270
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