Incorrect Permission Assignment for Critical Resource Affecting libvirt package, versions <7.6.0-0ubuntu3


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.06% (30th percentile)

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  • Snyk IDSNYK-UBUNTU2204-LIBVIRT-2776411
  • published15 Jul 2021
  • disclosed2 Mar 2022

Introduced: 15 Jul 2021

CVE-2021-3631  (opens in a new tab)
CWE-732  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 libvirt to version 7.6.0-0ubuntu3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt package and not the libvirt package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

CVSS Scores

version 3.1