CVE-2019-3887

medium
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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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3887

http://www.securityfocus.com/bid/107850

https://lists.fedoraproject.org/archives/list/[email protected]/message/IWPOIII2L73HV5PGXSGMRMKQIK47UIYE/

https://usn.ubuntu.com/3980-1/

https://usn.ubuntu.com/3979-1/

https://usn.ubuntu.com/3980-2/

https://access.redhat.com/errata/RHSA-2019:2703

https://access.redhat.com/errata/RHSA-2019:2741

Details

Source: MITRE

Published: 2019-04-09

Updated: 2021-11-02

Type: CWE-863

Risk Information

CVSS v2

Base Score: 4.7

Vector: AV:L/AC:M/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 5.6

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Impact Score: 4

Exploitability Score: 1.1

Severity: MEDIUM

Tenable Plugins

View all (11 total)

IDNameProductFamilySeverity
145668CentOS 8 : kernel (CESA-2019:2703)NessusCentOS Local Security Checks
high
128859RHEL 8 : kernel-rt (RHSA-2019:2741)NessusRed Hat Local Security Checks
high
128845Oracle Linux 8 : kernel (ELSA-2019-2703)NessusOracle Linux Local Security Checks
high
128665RHEL 8 : kernel (RHSA-2019:2703)NessusRed Hat Local Security Checks
high
126115Photon OS 3.0: Linux PHSA-2019-3.0-0015NessusPhotonOS Local Security Checks
high
125140Ubuntu 18.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3980-2) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)NessusUbuntu Local Security Checks
high
125139Ubuntu 18.10 : Linux kernel vulnerabilities (USN-3980-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)NessusUbuntu Local Security Checks
high
125138Ubuntu 19.04 : Linux kernel vulnerabilities (USN-3979-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)NessusUbuntu Local Security Checks
critical
124520Fedora 30 : kernel / kernel-headers / kernel-tools (2019-982b97f553)NessusFedora Local Security Checks
medium
124044Fedora 28 : kernel / kernel-headers / kernel-tools (2019-ce2933b003)NessusFedora Local Security Checks
medium
124043Fedora 29 : kernel / kernel-headers / kernel-tools (2019-94dc902948)NessusFedora Local Security Checks
medium