Fedora 28 : 2:qemu / libvirt (2019-6e146a714c) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)

medium Nessus Plugin ID 125299

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New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Fedora host is missing one or more security updates.

Description

Define md-clear CPUID bit.

Assuming an updated host kernel and microcode, the md-clear bit will be automatically exposed to guests using the QEMU '-cpu host' arg, or libvirt 'host-model' or 'host-passthrough' configurations.

Guests using a named CPU model it must be manually updated to add this extra CPU feature.

Resolves CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091

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 2:qemu and / or libvirt packages.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2019-6e146a714c

Plugin Details

Severity: Medium

ID: 125299

File Name: fedora_2019-6e146a714c.nasl

Version: 1.3

Type: local

Agent: unix

Published: 5/21/2019

Updated: 1/15/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2019-11091

VPR

Risk Factor: High

Score: 8.5

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

Vector: AV:L/AC:M/Au:N/C:C/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:2:qemu, 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 Ease: No known exploits are available

Patch Publication Date: 5/21/2019

Vulnerability Publication Date: 5/30/2019

Reference Information

CVE: CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091