Missing Release of Resource after Effective Lifetime Affecting virt:rhel/nbdkit-linuxdisk-plugin package, versions <0:1.16.2-4.module+el8.3.0+6922+fd575af8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-3858968
  • published26 Jul 2021
  • disclosed17 Jul 2020

Introduced: 17 Jul 2020

CVE-2020-14339  (opens in a new tab)
CWE-772  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/nbdkit-linuxdisk-plugin to version 0:1.16.2-4.module+el8.3.0+6922+fd575af8 or higher.
This issue was patched in RHSA-2020:4676.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/nbdkit-linuxdisk-plugin package and not the virt:rhel/nbdkit-linuxdisk-plugin package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 Scores

version 3.1