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

Synopsis

The remote Ubuntu host is missing one or more security-related
patches.

Description

Ken 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.

Solution

Update the affected libvirt-bin and / or libvirt0 packages.

See Also

https://usn.ubuntu.com/3680-1/

Plugin Details

Severity: Medium

ID: 110515

File Name: ubuntu_USN-3680-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2018/06/13

Modified: 2018/12/01

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libvirt-bin, p-cpe:/a:canonical:ubuntu_linux:libvirt0, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:17.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Patch Publication Date: 2018/06/12

Reference Information

CVE: CVE-2018-1064, CVE-2018-3639

USN: 3680-1