CVE ID:	CVE-2011-1751
Description:	The pciej_write function in hw/acpi_piix4.c in the PIIX4 Power Management emulation in qemu-kvm does not check if a device is hotpluggable before unplugging the PCI-ISA bridge, which allows privileged guest users to cause a denial of service (guest crash) and possibly execute arbitrary code by sending a crafted value to the 0xae08 (PCI_EJ_BASE) I/O port, which leads to a use-after-free related to "active qemu timers."
Test IDs:	1.3.6.1.4.1.25623.1.0.69739
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2011-1751 44393 http://secunia.com/advisories/44393 44458 http://secunia.com/advisories/44458 44648 http://secunia.com/advisories/44648 44658 http://secunia.com/advisories/44658 44660 http://secunia.com/advisories/44660 44900 http://secunia.com/advisories/44900 47927 http://www.securityfocus.com/bid/47927 73395 http://www.osvdb.org/73395 RHSA-2011:0534 http://rhn.redhat.com/errata/RHSA-2011-0534.html SUSE-SU-2011:0533 https://hermes.opensuse.org/messages/8572547 USN-1145-1 https://www.ubuntu.com/usn/USN-1145-1/ [Qemu-devel] 20110519 [PATCH] Ignore pci unplug requests for unpluggable devices http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html [oss-security] 20110519 CVE-2011-1751 qemu: acpi_piix4: missing hotplug check during device removal http://www.openwall.com/lists/oss-security/2011/05/19/2 http://blog.nelhage.com/2011/08/breaking-out-of-kvm/ http://blog.nelhage.com/2011/08/breaking-out-of-kvm/ http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca https://bugzilla.redhat.com/show_bug.cgi?id=699773 https://bugzilla.redhat.com/show_bug.cgi?id=699773 https://github.com/nelhage/virtunoid https://github.com/nelhage/virtunoid openSUSE-SU-2011:0510 http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html