CVE-2016-4020

NVD - CVE-2016-4020

CVE-2016-4020 Detail

Current Description

The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  6.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.qemu.org/?p=qemu.git;a=commit;h=691a02e2ce0c413236a78dee6f2651c937b09fb0 Patch  Vendor Advisory 
http://www.securityfocus.com/bid/86067 Third Party Advisory  VDB Entry 
http://www.ubuntu.com/usn/USN-2974-1 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:1856 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:2392 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2017:2408 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1313686 Issue Tracking  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html Mailing List  Third Party Advisory 
https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01106.html Patch  Third Party Advisory 
https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html Patch  Third Party Advisory 
https://security.gentoo.org/glsa/201609-01 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

11 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-4020
NVD Published Date:
05/25/2016
NVD Last Modified:
10/15/2020
Source:
Red Hat, Inc.