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AUSCERT External Security Bulletin Redistribution
ESB-2019.0838
libvirt vulnerability
15 March 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: libvirt-clients
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3840
Original Bulletin:
http://www.ubuntu.com/usn/usn-3909-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running libvirt-clients check for an updated version of the software
for their operating system.
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Ubuntu Security Notice USN-3909-1
March 14, 2019
libvirt vulnerability
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
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