N/A - USN-3909-1

Executive Summary

Summary
Title	libvirt vulnerability

Informations
Name	USN-3909-1	First vendor Publication	2019-03-14
Vendor	Ubuntu	Last vendor Modification	2019-03-14
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

libvirt could be made to crash under certain conditions.

Software Description: - libvirt: Libvirt virtualization toolkit

Details:

It was discovered that libvirt incorrectly handled waiting for certain agent events. An attacker inside a guest could possibly use this issue to cause libvirtd to stop responding, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.10:
libvirt-clients 4.6.0-2ubuntu3.4
libvirt-daemon 4.6.0-2ubuntu3.4
libvirt0 4.6.0-2ubuntu3.4

Ubuntu 18.04 LTS:
libvirt-clients 4.0.0-1ubuntu8.8
libvirt-daemon 4.0.0-1ubuntu8.8
libvirt0 4.0.0-1ubuntu8.8

Ubuntu 16.04 LTS:
libvirt-bin 1.3.1-1ubuntu10.25
libvirt0 1.3.1-1ubuntu10.25

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3909-1
CVE-2019-3840

Package Information:
https://launchpad.net/ubuntu/+source/libvirt/4.6.0-2ubuntu3.4
https://launchpad.net/ubuntu/+source/libvirt/4.0.0-1ubuntu8.8
https://launchpad.net/ubuntu/+source/libvirt/1.3.1-1ubuntu10.25