CVE-2011-2512 - Crafty Intercourse

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.

Reference

http://secunia.com/advisories/45158 http://www.osvdb.org/74751 http://ubuntu.com/usn/usn-1165-1 http://rhn.redhat.com/errata/RHSA-2011-0919.html http://www.openwall.com/lists/oss-security/2011/06/29/15 http://www.openwall.com/lists/oss-security/2011/06/28/13 https://hermes.opensuse.org/messages/9605323 http://secunia.com/advisories/45170 http://secunia.com/advisories/45301 http://secunia.com/advisories/44648 http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html http://secunia.com/advisories/44458 http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commitdiff;h=7157e2e23e89adcd436caeab31fdd6b47eded377 https://www.debian.org/security/2011/dsa-2270