Vulnerability Name:

CVE-2019-3887 (CCN-159191)

Assigned:2019-04-05
Published:2019-04-05
Updated:2023-02-12
Summary: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.
CVSS v3 Severity:5.6 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H)
4.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.1 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
6.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.7 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:H)
5.8 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): High
CVSS v2 Severity:4.7 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-863
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-3887

Source: secalert@redhat.com
Type: Third Party Advisory, VDB Entry
secalert@redhat.com

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Issue Tracking, Patch, Third Party Advisory
secalert@redhat.com

Source: XF
Type: UNKNOWN
linux-kernel-cve20193887-dos(159191)

Source: CCN
Type: Linux Kernel GIT Repository
KVM: x86: nVMX: close leak of L0's x2APIC MSRs (CVE-2019-3887)

Source: secalert@redhat.com
Type: UNKNOWN
secalert@redhat.com

Source: CCN
Type: oss-sec Mailing List, Mon, 8 Apr 2019 10:07:52 +0530 (IST)
CVE-2019-3887 Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Source: secalert@redhat.com
Type: Third Party Advisory
secalert@redhat.com

Vulnerable Configuration:Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*
    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*
    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:8:*:*:*:*:*:*:*
    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:8::baseos:*:*:*:*:*
    • Configuration RedHat 5:
  • cpe:/a:redhat:enterprise_linux:8::nfv:*:*:*:*:*
    • Configuration RedHat 6:
  • cpe:/a:redhat:enterprise_linux:8::realtime:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:accelatech:bizsearch:3.2:-:*:*:*:linux_kernel:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112507
    P
    		kernel-devel-5.14.6-1.4 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105999
    P
    		kernel-devel-5.14.6-1.4 on GA media (Moderate)
    2021-10-01
    oval:com.redhat.rhsa:def:20192703
    P
    		RHSA-2019:2703: kernel security and bug fix update (Important)
    2019-09-12
    oval:com.redhat.rhsa:def:20192741
    P
    		RHSA-2019:2741: kernel-rt security and bug fix update (Important)
    2019-09-12
    oval:com.ubuntu.disco:def:201938870000000
    V
    		CVE-2019-3887 on Ubuntu 19.04 (disco) - medium.
    2019-04-09
    oval:com.ubuntu.cosmic:def:20193887000
    V
    		CVE-2019-3887 on Ubuntu 18.10 (cosmic) - medium.
    2019-04-09
    oval:com.ubuntu.cosmic:def:201938870000000
    V
    		CVE-2019-3887 on Ubuntu 18.10 (cosmic) - medium.
    2019-04-09
    oval:com.ubuntu.bionic:def:20193887000
    V
    		CVE-2019-3887 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-04-09
    oval:com.ubuntu.bionic:def:201938870000000
    V
    		CVE-2019-3887 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-04-09
    oval:com.ubuntu.xenial:def:20193887000
    V
    		CVE-2019-3887 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-04-09
    oval:com.ubuntu.xenial:def:201938870000000
    V
    		CVE-2019-3887 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-04-09
    oval:com.ubuntu.trusty:def:20193887000
    V
    		CVE-2019-3887 on Ubuntu 14.04 LTS (trusty) - medium.
    2019-04-09
    BACK
    accelatech bizsearch 3.2 -