VULNERABILITY

Oracle Linux: CVE-2016-4020: ELSA-2017-1856: qemu-kvm security, bug fix, and enhancement update (MODERATE)

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Oracle Linux: CVE-2016-4020: ELSA-2017-1856: qemu-kvm security, bug fix, and enhancement update (MODERATE)

Severity
2
CVSS
(AV:A/AC:H/Au:N/C:P/I:N/A:N)
Published
04/07/2016
Created
07/25/2018
Added
08/08/2017
Modified
01/07/2025

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). An information-exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR) optimizations for 32-bit Windows guests. The flaw could occur while accessing TPR. A privileged user inside a guest could use this issue to read portions of the host memory.

Solution(s)

  • oracle-linux-upgrade-qemu-img
  • oracle-linux-upgrade-qemu-kvm
  • oracle-linux-upgrade-qemu-kvm-common
  • oracle-linux-upgrade-qemu-kvm-tools

References

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