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Last updated: 8/29/2014 5:57:04 AM

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Vulnerability Workload Index: 5.81
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Vulnerability Summary for CVE-2011-1751

Original release date: 06/21/2012
Last revised: 02/13/2013
Source: US-CERT/NIST

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 v2 Base Score: 7.4 (HIGH) (AV:A/AC:M/Au:S/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 4.4
CVSS Version 2 Metrics:
Access Vector: Local network exploitable
Access Complexity: Medium
Authentication: Required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: SECUNIA
Name: 44658
Type: Advisory
External Source: SECUNIA
Name: 44900
Type: Advisory
External Source: MLIST
Name: [oss-security] 20110519 CVE-2011-1751 qemu: acpi_piix4: missing hotplug check during device removal
External Source: REDHAT
Name: RHSA-2011:0534
External Source: SECUNIA
Name: 44660
Type: Advisory
External Source: MISC
Name: https://bugzilla.redhat.com/show_bug.cgi?id=699773
External Source: SUSE
Name: SUSE-SU-2011:0533
External Source: SECUNIA
Name: 44648
Type: Advisory
External Source: MLIST
Name: [Qemu-devel] 20110519 [PATCH] Ignore pci unplug requests for unpluggable devices
External Source: SUSE
Name: openSUSE-SU-2011:0510
External Source: SECUNIA
Name: 44458
Type: Advisory
External Source: BID
Name: 47927
External Source: MISC
Name: http://blog.nelhage.com/2011/08/breaking-out-of-kvm/
External Source: UBUNTU
Name: USN-1145-1
External Source: MISC
Name: https://github.com/nelhage/virtunoid
External Source: SECUNIA
Name: 44393
Type: Advisory
External Source: OSVDB
Name: 73395
External Source: CONFIRM
Name: http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=commit;h=505597e4476a6bc219d0ec1362b760d71cb4fdca

Vulnerable software and versions

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* cpe:/a:qemu:qemu:0.9.0
* cpe:/a:qemu:qemu:0.7.2
* cpe:/a:qemu:qemu:0.8.0
* cpe:/a:qemu:qemu:0.8.1
* cpe:/a:qemu:qemu:0.8.2
* cpe:/a:qemu:qemu:0.9.1
* cpe:/a:qemu:qemu:0.4.1
* cpe:/a:qemu:qemu:0.4
* cpe:/a:qemu:qemu:0.3
* cpe:/a:qemu:qemu:0.2
* cpe:/a:qemu:qemu:0.5.1
* cpe:/a:qemu:qemu:0.5.0
* cpe:/a:qemu:qemu:0.4.3
* cpe:/a:qemu:qemu:0.4.2
* cpe:/a:qemu:qemu:0.5.5
* cpe:/a:qemu:qemu:0.5.4
* cpe:/a:qemu:qemu:0.5.3
* cpe:/a:qemu:qemu:0.5.2
* cpe:/a:qemu:qemu:0.7.1
* cpe:/a:qemu:qemu:0.7.0
* cpe:/a:qemu:qemu:0.6.1
* cpe:/a:qemu:qemu:0.6.0
* cpe:/a:qemu:qemu:0.12.0:rc1
* cpe:/a:qemu:qemu:0.12.5
* cpe:/a:qemu:qemu:0.12.4
* cpe:/a:qemu:qemu:0.13.0:rc1
* cpe:/a:qemu:qemu:0.13.0:rc0
* cpe:/a:qemu:qemu:0.11.0
* cpe:/a:qemu:qemu:0.14.0:rc0
* cpe:/a:qemu:qemu:0.13.0
* cpe:/a:qemu:qemu:0.1.1
* cpe:/a:qemu:qemu:0.14.0:rc2
* cpe:/a:qemu:qemu:0.1.2
* cpe:/a:qemu:qemu:0.14.0:rc1
* cpe:/a:qemu:qemu:0.14.1
* cpe:/a:qemu:qemu:0.1
* cpe:/a:qemu:qemu:0.14.0
* cpe:/a:qemu:qemu:0.1.5
* cpe:/a:qemu:qemu:0.15.0:rc2
* cpe:/a:qemu:qemu:0.1.6
* cpe:/a:qemu:qemu:0.15.0:rc1
* cpe:/a:qemu:qemu:1.0:rc2
* cpe:/a:qemu:qemu:0.1.3
* cpe:/a:qemu:qemu:1.0:rc1
* cpe:/a:qemu:qemu:0.1.4
* cpe:/a:qemu:qemu:1.1:rc3
* cpe:/a:qemu:qemu:0.10.5
* cpe:/a:qemu:qemu:1.1:rc4
* cpe:/a:qemu:qemu:0.10.4
* cpe:/a:qemu:qemu:1.1:rc1
* cpe:/a:qemu:qemu:1.1:rc2
* cpe:/a:qemu:qemu:0.10.6
* cpe:/a:qemu:qemu:1.0
* cpe:/a:qemu:qemu:0.10.1
* cpe:/a:qemu:qemu:1.0.1
* cpe:/a:qemu:qemu:0.10.0
* cpe:/a:qemu:qemu:1.0:rc3
* cpe:/a:qemu:qemu:0.10.3
* cpe:/a:qemu:qemu:1.0:rc4
* cpe:/a:qemu:qemu:0.10.2
* cpe:/a:qemu:qemu:0.11.0-rc0
* cpe:/a:qemu:qemu:1.1
* cpe:/a:qemu:qemu:0.11.0-rc2
* cpe:/a:qemu:qemu:0.11.0-rc1
* cpe:/a:qemu:qemu:0.12.0
* cpe:/a:qemu:qemu:0.12.0:rc2
* cpe:/a:qemu:qemu:0.12.1
* cpe:/a:qemu:qemu:0.12.3
* cpe:/a:qemu:qemu:0.11.0:rc1
* cpe:/a:qemu:qemu:0.12.2
* cpe:/a:qemu:qemu:0.9.1-5
* cpe:/a:qemu:qemu:0.11.1
* cpe:/a:qemu:qemu:0.11.0:rc2
* cpe:/a:qemu:qemu:0.11.0:rc0
* Denotes Vulnerable Software
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Technical Details

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