Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2019-3887

Disclosure Date: April 09, 2019
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0’s APIC register values via L2 guest, when ‘virtualize x2APIC mode’ is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

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CVSS V3 Severity and Metrics
Base Score:
5.6 Medium
Impact Score:
4
Exploitability Score:
1.1
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
High
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Vendors

  • canonical,
  • fedoraproject,
  • linux,
  • redhat

Products

  • enterprise linux 8.0,
  • enterprise linux eus 8.1,
  • enterprise linux eus 8.2,
  • enterprise linux eus 8.4,
  • enterprise linux for real time 8,
  • enterprise linux for real time for nfv 8,
  • enterprise linux for real time for nfv tus 8.2,
  • enterprise linux for real time for nfv tus 8.4,
  • enterprise linux for real time tus 8.2,
  • enterprise linux for real time tus 8.4,
  • enterprise linux server aus 8.2,
  • enterprise linux server aus 8.4,
  • enterprise linux server tus 8.2,
  • enterprise linux server tus 8.4,
  • fedora 29,
  • linux kernel,
  • ubuntu linux 18.04,
  • ubuntu linux 18.10,
  • ubuntu linux 19.04
Technical Analysis