Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : libvirt vulnerability and update (USN-3680-1) (Spectre)
Medium Nessus Plugin ID 110515
SynopsisThe remote Ubuntu host is missing one or more security-related
DescriptionKen Johnson and Jann Horn independently discovered that
microprocessors utilizing speculative execution of a memory read may
allow unauthorized memory reads via sidechannel attacks. An attacker
in the guest could use this to expose sensitive guest information,
including kernel memory. This update allows libvirt to expose new CPU
features added by microcode updates to guests. (CVE-2018-3639)
Daniel P. Berrange discovered that libvirt incorrectly handled the
QEMU guest agent. An attacker could possibly use this issue to consume
resources, leading to a denial of service. (CVE-2018-1064).
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.
SolutionUpdate the affected libvirt-bin and / or libvirt0 packages.