Fedora 28 : xen (2019-bce6498890)

high Nessus Plugin ID 123046

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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 a security update.

Description

xen: various flaws (#1685577) grant table transfer issues on large hosts [XSA-284] race with pass-through device hotplug [XSA-285] x86:
steal_page violates page_struct access discipline [XSA-287] x86:
Inconsistent PV IOMMU discipline [XSA-288] missing preemption in x86 PV page table unvalidation [XSA-290] x86/PV: page type reference counting issue with failed IOMMU update [XSA-291] x86: insufficient TLB flushing when using PCID [XSA-292] x86: PV kernel context switch corruption [XSA-293] x86 shadow: Insufficient TLB flushing when using PCID [XSA-294]

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update to xen-4.10.3

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- insufficient TLB flushing / improper large page mappings with AMD IOMMUs [XSA-275] (#1651665)

- x86: DoS from attempting to use INVPCID with a non-canonical addresses [XSA-279]

- Fix for XSA-240 conflicts with shadow paging [XSA-280]

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guest use of HLE constructs may lock up host [XSA-282]

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-2019-bce6498890

Plugin Details

Severity: High

ID: 123046

File Name: fedora_2019-bce6498890.nasl

Version: 1.3

Type: local

Agent: unix

Published: 3/25/2019

Updated: 2/3/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:xen, 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: 3/21/2019

Vulnerability Publication Date: 12/8/2018

Reference Information

CVE: CVE-2018-19961, CVE-2018-19962, CVE-2018-19963, CVE-2018-19965, CVE-2018-19966