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."

Category

7.4
CVSS
Severity: High
CVSS 2.0 •
EPSS 0.37%
Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory secunia.com Vendor Advisory secunia.com Vendor Advisory secunia.com Vendor Advisory secunia.com Vendor Advisory secunia.com Vendor Advisory secunia.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2011/05/19/2 mailing list
http://rhn.redhat.com/errata/RHSA-2011-0534.html vendor advisory
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca
http://secunia.com/advisories/44648 third party advisory vendor advisory
http://www.osvdb.org/73395 vdb entry
http://secunia.com/advisories/44393 third party advisory vendor advisory
http://secunia.com/advisories/44658 third party advisory vendor advisory
https://hermes.opensuse.org/messages/8572547 vendor advisory
http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html mailing list
http://www.securityfocus.com/bid/47927 vdb entry
https://github.com/nelhage/virtunoid
https://bugzilla.redhat.com/show_bug.cgi?id=699773
http://secunia.com/advisories/44458 third party advisory vendor advisory
http://secunia.com/advisories/44660 third party advisory vendor advisory
http://blog.nelhage.com/2011/08/breaking-out-of-kvm/
https://www.ubuntu.com/usn/USN-1145-1/ vendor advisory
http://secunia.com/advisories/44900 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2011-1751?
CVE-2011-1751 has been scored as a high severity vulnerability.
How to fix CVE-2011-1751?
To fix CVE-2011-1751, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-1751 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2011-1751 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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