Fedora 28 : libvirt (2018-527698a904) (Spectre)

Medium Nessus Plugin ID 120426

Synopsis

The remote Fedora host is missing a security update.

Description

Add new CPU features for speculative store bypass (CVE-2018-3639)

On Intel x86 hosts, the 'ssbd' feature must be explicitly added to any virtual machines that are not using host-passthrough/host-model CPU setup. NB this requires new microcode too, which is not yet available in Fedora microcode_ctl RPMs.

On AMD x86 hosts, the 'virt-ssbd' feature must be explicitly added to any virtual machines that are not using host-passthrough/host-model CPU setup. There is no microcode dependency for AMD as this is a virtualized CPUID feature.

In both cases, kernel >= 4.16.10-301 is required on the host and guest in order to activate the fix.

QEMU >= qemu-2.11.1-3.fc28 is also required on the host

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libvirt package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2018-527698a904

Plugin Details

Severity: Medium

ID: 120426

File Name: fedora_2018-527698a904.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2019/01/03

Updated: 2019/04/02

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.9

Temporal Score: 3.8

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 5.5

Temporal Score: 5

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:libvirt, cpe:/o:fedoraproject:fedora:28

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/06/21

Reference Information

CVE: CVE-2018-3639