Описание
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."
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."
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2011-1751
- https://access.redhat.com/errata/RHSA-2011:0534
- https://access.redhat.com/security/cve/CVE-2011-1751
- https://bugzilla.redhat.com/show_bug.cgi?id=699773
- https://github.com/nelhage/virtunoid
- https://hermes.opensuse.org/messages/8572547
- https://www.ubuntu.com/usn/USN-1145-1
- 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;a=commit;h=505597e4476a6bc219d0ec1362b760d71cb4fdca
- http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html
- http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html
- http://rhn.redhat.com/errata/RHSA-2011-0534.html
- http://secunia.com/advisories/44393
- http://secunia.com/advisories/44458
- http://secunia.com/advisories/44648
- http://secunia.com/advisories/44658
- http://secunia.com/advisories/44660
- http://secunia.com/advisories/44900
- http://www.openwall.com/lists/oss-security/2011/05/19/2
- http://www.osvdb.org/73395
- http://www.securityfocus.com/bid/47927
Связанные уязвимости
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."
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."
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."
The pciej_write function in hw/acpi_piix4.c in the PIIX4 Power Managem ...
ELSA-2011-0534: qemu-kvm security, bug fix, and enhancement update (IMPORTANT)