CVE Reference: CVE-2011-1751

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Original Page at CVE MITRE:
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."

CVE Status:
Candidate

References:

UBUNTU

SUSE
  http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html

SAID
  Secunia Advisory: SA44393
  Secunia Advisory: SA44458
  Secunia Advisory: SA44648
  Secunia Advisory: SA44658
  Secunia Advisory: SA44660
  Secunia Advisory: SA44900

REDHAT
  http://rhn.redhat.com/errata/RHSA-2011-0534.html

OSVDB
  73395

MLIST
  http://www.openwall.com/lists/oss-security/2011/05/19/2
  http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html

MISC
  http://blog.nelhage.com/2011/08/breaking-out-of-kvm/

CONFIRM
  http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commit;h=505597e4476a6bc219d0ec1362b760d71cb4fdca

BID
  47927


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