NULL Pointer Dereference Affecting libvirt-daemon-config-nwfilter package, versions <0:8.0.0-5.module+el8.6.0+14480+c0a3aa0f


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.48% (39th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CENTOS8-LIBVIRTDAEMONCONFIGNWFILTER-2817966
  • published26 Jul 2021
  • disclosed23 Jan 2021

Introduced: 23 Jan 2021

CVE-2021-20196  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Centos:8 libvirt-daemon-config-nwfilter to version 0:8.0.0-5.module+el8.6.0+14480+c0a3aa0f or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt-daemon-config-nwfilter package and not the libvirt-daemon-config-nwfilter package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS Base Scores

version 3.1