CVE-2016-4020
MEDIUM severity · CVSS 6.5
6.5CVSS MEDIUM
Summary
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).
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=691a02e2ce0c413236a78dee6f2651c937b09fb0
- http://www.securityfocus.com/bid/86067Advisory
- http://www.ubuntu.com/usn/USN-2974-1Advisory
- https://access.redhat.com/errata/RHSA-2017:1856Advisory
- https://access.redhat.com/errata/RHSA-2017:2392Advisory
- https://access.redhat.com/errata/RHSA-2017:2408Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1313686Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlAdvisory