CVE-2011-1751 | BDVDB-2026-50646 Detail
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."
Impact#
No impact statement in the source data.
Weaknesses#
No weakness recorded in the source data.
References#
- http://www.openwall.com/lists/oss-security/2011/05/19/2
- http://rhn.redhat.com/errata/RHSA-2011-0534.html
- http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca
- http://secunia.com/advisories/44648
- http://www.osvdb.org/73395
- http://secunia.com/advisories/44393
- http://secunia.com/advisories/44658
- https://hermes.opensuse.org/messages/8572547
- http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html
- http://www.securityfocus.com/bid/47927
- https://github.com/nelhage/virtunoid
- https://bugzilla.redhat.com/show_bug.cgi?id=699773
- http://secunia.com/advisories/44458
- http://secunia.com/advisories/44660
- http://blog.nelhage.com/2011/08/breaking-out-of-kvm/
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.