National Cyber Awareness System

Vulnerability Summary for CVE-2011-1751

Overview

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

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: UBUNTU

Name: USN-1145-1

Hyperlink:https://lists.ubuntu.com/archives/ubuntu-security-announce/2011-June/001349.html

External Source: SUSE

Name: SUSE-SU-2011:0533

Hyperlink:https://hermes.opensuse.org/messages/8572547

External Source: MISC

Name: https://github.com/nelhage/virtunoid

Hyperlink:https://github.com/nelhage/virtunoid

External Source: MISC

Name: https://bugzilla.redhat.com/show_bug.cgi?id=699773

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=699773

External Source: BID

Name: 47927

Hyperlink:http://www.securityfocus.com/bid/47927

External Source: OSVDB

Name: 73395

Hyperlink:http://www.osvdb.org/73395

External Source: MLIST

Name: [oss-security] 20110519 CVE-2011-1751 qemu: acpi_piix4: missing hotplug check during device removal

Hyperlink:http://www.openwall.com/lists/oss-security/2011/05/19/2

External Source: SECUNIA

Name: 44900

Type: Advisory

Hyperlink:http://secunia.com/advisories/44900

External Source: SECUNIA

Name: 44660

Type: Advisory

Hyperlink:http://secunia.com/advisories/44660

External Source: SECUNIA

Name: 44658

Type: Advisory

Hyperlink:http://secunia.com/advisories/44658

External Source: SECUNIA

Name: 44648

Type: Advisory

Hyperlink:http://secunia.com/advisories/44648

External Source: SECUNIA

Name: 44458

Type: Advisory

Hyperlink:http://secunia.com/advisories/44458

External Source: SECUNIA

Name: 44393

Type: Advisory

Hyperlink:http://secunia.com/advisories/44393

External Source: REDHAT

Name: RHSA-2011:0534

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

External Source: SUSE

Name: openSUSE-SU-2011:0510

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

External Source: MLIST

Name: [Qemu-devel] 20110519 [PATCH] Ignore pci unplug requests for unpluggable devices

Hyperlink:http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html

External Source: CONFIRM

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

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

External Source: MISC

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

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