Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2011-1751

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
21/06/2012
Last modified:
11/04/2025

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

Vector 2.0
AV:A/AC:M/Au:S/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.40 HIGH
Vector: AV:A/AC:M/Au:S/C:C/I:C/A:C

Attack Vector (AV): Adjacent
Attack Complexity (AC): Medium
Authentication (Au): Single
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
7.40
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:qemu:qemu:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.1.2:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.1.3:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.1.4:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.1.5:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.1.6:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.4.2:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.4.3:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.5.0:*:*:*:*:*:*:*
cpe:2.3:a:qemu:qemu:0.5.1:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools