CVE-2012-4539

Description

From CVE.org

Xen 4.0 through 4.2, when running 32-bit x86 PV guests on 64-bit hypervisors, allows local guest OS administrators to cause a denial of service (infinite loop and hang or crash) via invalid arguments to GNTTABOP_get_status_frames, aka "Grant table hypercall infinite loop DoS vulnerability."

Statement

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 Score Breakdown

Red HatNVDcve.org
Base Score5.52.1N/A
Attack VectorAdjacent NetworkLocalN/A
Access ComplexityLowLowN/A
AuthenticationSingleNoneN/A
Confidentiality ImpactNoneNoneN/A
Integrity ImpactNoneNoneN/A
Availability ImpactCompletePartialN/A

Vector

Red Hat: AV:A/AC:L/Au:S/C:N/I:N/A:C

NVD: AV:L/AC:L/Au:N/C:N/I:N/A:P

Understanding the Weakness (CWE)

CWE-835

Availability

Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Amplification

An infinite loop will cause unexpected consumption of resources, such as CPU cycles or memory. The software's operation may slow down, or cause a long time to respond.

Acknowledgements

Red Hat would like to thank Xen project for reporting this issue.

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