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FreeBSD: VID-56F0F11E-BA4D-11E6-AE1B-002590263BF5 (CVE-2016-9383): xen-kernel -- x86 64-bit bit test instruction emulation broken

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FreeBSD: VID-56F0F11E-BA4D-11E6-AE1B-002590263BF5 (CVE-2016-9383): xen-kernel -- x86 64-bit bit test instruction emulation broken

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
11/22/2016
Created
07/25/2018
Added
12/04/2016
Modified
05/07/2019

Description

Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions.

Solution(s)

  • freebsd-upgrade-package-xen-kernel

References

  • CVE-2016-9383
  • DLA-720-1
  • DSA-3729

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