CVE-2020-14339

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1860069

https://security.gentoo.org/glsa/202101-22

Details

Source: MITRE

Published: 2020-12-03

Updated: 2021-02-09

Type: CWE-772

Risk Information

CVSS v2

Base Score: 7.2

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

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 8.8

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

Impact Score: 6

Exploitability Score: 2

Severity: HIGH

Tenable Plugins

View all (10 total)

IDNameProductFamilySeverity
147678EulerOS Virtualization 2.9.0 : libvirt (EulerOS-SA-2021-1666)NessusHuawei Local Security Checks
medium
147481EulerOS Virtualization 2.9.1 : libvirt (EulerOS-SA-2021-1631)NessusHuawei Local Security Checks
medium
146032CentOS 8 : virt:rhel and virt-devel:rhel (CESA-2020:4676)NessusCentOS Local Security Checks
high
145425GLSA-202101-22 : libvirt: Unintended access to /dev/mapper/controlNessusGentoo Local Security Checks
high
142449RHEL 8 : virt:rhel and virt-devel:rhel (RHSA-2020:4676)NessusRed Hat Local Security Checks
high
140685openSUSE Security Update : libvirt (openSUSE-2020-1455)NessusSuSE Local Security Checks
high
140110RHEL 8 : virt:8.2 and virt-devel:8.2 (RHSA-2020:3586)NessusRed Hat Local Security Checks
high
139690SUSE SLED15 / SLES15 Security Update : libvirt (SUSE-SU-2020:2269-1)NessusSuSE Local Security Checks
high
139656SUSE SLED15 / SLES15 Security Update : libvirt (SUSE-SU-2020:2237-1)NessusSuSE Local Security Checks
high
139594SUSE SLES12 Security Update : libvirt (SUSE-SU-2020:2233-1)NessusSuSE Local Security Checks
high