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high7.4

CVE-2011-1751

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 th…

Impact

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."

Affected products

VendorProductAffected versions
QemuQemu
Versions 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5

Weakness classification

CWE-20

References