An IT security alert update for a known vulnerability has been released for libvirt. You can find out how affected users should behave here.
The Federal Office for Security in Information Technology (BSI) published an update on April 1st, 2024 to a security vulnerability for libvirt that became known on May 5th, 2020. The security vulnerability affects the Linux operating system as well as the products Debian Linux, open source libvirt, Ubuntu Linux and SUSE Linux.
The latest manufacturer recommendations regarding updates, workarounds and security patches for this vulnerability can be found here: Debian Security Advisory DLA-3778 (As of April 1, 2024). Other useful links are listed later in this article.
Security advisory for libvirt – Risk: medium
Risk level: 3 (medium)
CVSS Base Score: 6,5
CVSS Temporal Score: 5,7
Remoteangriff: Ja
The Common Vulnerability Scoring System (CVSS) is used to assess the severity of security vulnerabilities in computer systems. The CVSS standard makes it possible to compare potential or actual security vulnerabilities based on various metrics in order to create a priority list for taking countermeasures. The attributes “none”, “low”, “medium”, “high” and “critical” are used to determine the severity levels of a vulnerability. The Base Score evaluates the requirements for an attack (including authentication, complexity, privileges, user interaction) and its consequences. With the temporal score, framework conditions that can change over time are taken into account in the evaluation. According to the CVSS, the threat of the current vulnerability is assessed as “medium” with a base score of 6.5.
libvirt Bug: Vulnerability enables denial of service
Libvirt is a library that provides interfaces to the virtualization functions of Linux and provides tools for managing virtualized systems.
A remote, anonymous attacker could exploit a vulnerability in libvirt to conduct a denial of service attack.
The vulnerability is identified with the unique CVE (Common Vulnerabilities and Exposures) identification number. CVE-2020-12430 traded.
Systems affected by the libvirt security vulnerability at a glance
operating system
Linux
Products
Debian Linux (cpe:/o:debian:debian_linux)
Open Source libvirt Ubuntu Linux (cpe:/o:canonical:ubuntu_linux)
SUSE Linux (cpe:/o:suse:suse_linux)
General measures for dealing with IT vulnerabilities
Users of the affected systems should keep them up to date. When security gaps become known, manufacturers are required to fix them as quickly as possible by developing a patch or a workaround. If security patches are available, install them promptly. For information, consult the sources listed in the next section. These often contain further information about the latest version of the software in question as well as the availability of security patches or information about workarounds. If you have any further questions or uncertainties, please contact your responsible administrator. IT security managers should regularly check the sources mentioned to see whether a new security update is available.
Manufacturer information on updates, patches and workarounds
Here you will find further links with information about bug reports, security fixes and workarounds.
Debian Security Advisory DLA-3778 vom 2024-04-01 (01.04.2024)
For more information, see:
Ubuntu Security Notice USN-4371-1 vom 2020-05-21 (21.05.2020)
For more information, see:
SUSE Security Update SUSE-SU-2020:1277-1 vom 2020-05-21 (21.05.2020)
For more information, see:
SUSE Security Update SUSE-SU-2020:1208-1 vom 2020-05-15 (14.05.2020)
For more information, see:
Red Hat Bugzilla Bug 1828190 dated 2020-05-05 (05.05.2020)
For more information, see:
Version history of this security alert
This is the 5th version of this IT security notice for libvirt. If further updates are announced, this text will be updated. You can see the changes made using the version history below.
May 5, 2020 – Initial version
May 14, 2020 – New updates from SUSE added
May 21, 2020 – New updates from SUSE and Ubuntu added
May 28, 2020 – Reference(s) added: FEDORA-2020-5CD83EFDA7
April 1, 2024 – New updates from Debian added
+++ Editorial note: This text was generated based on current BSI data and will be updated in a data-driven manner depending on the warning situation. We accept feedback and comments at [email protected]. +++
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Edited by kns
roj/news.de