Incorrect Permission Assignment for Critical Resource 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
0.06% (29th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4982197
  • published26 Jul 2021
  • disclosed13 Apr 2021

Introduced: 13 Apr 2021

CVE-2021-3631  (opens in a new tab)
CWE-732  (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-2021:4191.

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 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