CVE-2011-1751
7.4 High
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:A/AC:M/Au:S/C:C/I:C/A:C
7.3 High
AI Score
Confidence
Low
0.001 Low
EPSS
Percentile
43.4%
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 configurations
References
blog.nelhage.com/2011/08/breaking-out-of-kvm/
git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca
lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html
lists.opensuse.org/opensuse-updates/2011-05/msg00043.html
rhn.redhat.com/errata/RHSA-2011-0534.html
secunia.com/advisories/44393
secunia.com/advisories/44458
secunia.com/advisories/44648
secunia.com/advisories/44658
secunia.com/advisories/44660
secunia.com/advisories/44900
www.openwall.com/lists/oss-security/2011/05/19/2
www.osvdb.org/73395
www.securityfocus.com/bid/47927
bugzilla.redhat.com/show_bug.cgi?id=699773
github.com/nelhage/virtunoid
hermes.opensuse.org/messages/8572547
www.ubuntu.com/usn/USN-1145-1/
Related
7.4 High
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:A/AC:M/Au:S/C:C/I:C/A:C
7.3 High
AI Score
Confidence
Low
0.001 Low
EPSS
Percentile
43.4%