CVE-2020-14339

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.

CVSS Metrics

• v3.1•HIGH•Score: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
• v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.20%• Percentile: 41%

Techniques & Countermeasures

• CWE-772•Missing Release of Resource after Effective Lifetime

  The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

Affected Systems

• redhat•enterprise_linux

  8.0

• redhat•libvirt

  ≥ 6.2.0, < 6.7.0

References (3)

• https://bugzilla.redhat.com/show_bug.cgi?id=1860069
• https://security.gentoo.org/glsa/202101-22
• https://security.gentoo.org/glsa/202210-06