Detections
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Fedora 31 : xen (2020-6dd36a716c)

high Nessus Plugin ID 143135

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Synopsis

The remote Fedora host is missing a security update.

Description

revised patch for XSA-286 (mitigating performance impact)

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x86 PV guest INVLPG-like flushes may leave stale TLB entries [XSA-286, CVE-2020-27674] (#1891092)

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x86: Race condition in Xen mapping code [XSA-345] undue deferral of IOMMU TLB flushes [XSA-346] unsafe AMD IOMMU page table updates [XSA-347]

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 xen package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2020-6dd36a716c

Plugin Details

Severity: High

ID: 143135

File Name: fedora_2020-6dd36a716c.nasl

Version: 1.4

Type: local

Agent: unix

Published: 11/20/2020

Updated: 2/8/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

CVSS Score Source: CVE-2020-27672

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS Score Source: CVE-2020-27671

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:xen, cpe:/o:fedoraproject:fedora:31

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/20/2020

Vulnerability Publication Date: 10/22/2020

Reference Information

CVE: CVE-2020-27670, CVE-2020-27671, CVE-2020-27672, CVE-2020-27674