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Fedora 27 : xen (2018-1a467757ce)

critical Nessus Plugin ID 111236

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Synopsis

The remote Fedora host is missing a security update.

Description

preemption checks bypassed in x86 PV MM handling [XSA-264, CVE-2018-12891] x86: #DB exception safety check can be triggered by a guest [XSA-265, CVE-2018-12893] libxl fails to honour readonly flag on HVM emulated SCSI disks [XSA-266, CVE-2018-12892]

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Speculative register leakage from lazy FPU context switching [XSA-267, CVE-2018-3665] fix for change in iasl output

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-2018-1a467757ce

Plugin Details

Severity: Critical

ID: 111236

File Name: fedora_2018-1a467757ce.nasl

Version: 1.6

Type: local

Agent: unix

Published: 7/24/2018

Updated: 9/3/2024

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: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2018-12892

CVSS v3

Risk Factor: Critical

Base Score: 9.9

Temporal Score: 8.6

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

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

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:27, p-cpe:/a:fedoraproject:fedora:xen

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/13/2018

Vulnerability Publication Date: 6/21/2018

Reference Information

CVE: CVE-2018-12891, CVE-2018-12892, CVE-2018-12893, CVE-2018-3665