Debian DSA-4210-1 : xen - security update (Spectre)

medium Nessus Plugin ID 110102
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 Debian host is missing a security-related update.

Description

This update provides mitigations for the Spectre v4 variant in x86-based micro processors. On Intel CPUs this requires updated microcode which is currently not released publicly (but your hardware vendor may have issued an update). For servers with AMD CPUs no microcode update is needed, please refer to https://xenbits.xen.org/xsa/advisory-263.html for further information.

Solution

Upgrade the xen packages.

For the stable distribution (stretch), this problem has been fixed in version 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7.

See Also

https://xenbits.xen.org/xsa/advisory-263.html

https://security-tracker.debian.org/tracker/source-package/xen

https://packages.debian.org/source/stretch/xen

https://www.debian.org/security/2018/dsa-4210

Plugin Details

Severity: Medium

ID: 110102

File Name: debian_DSA-4210.nasl

Version: 1.7

Type: local

Agent: unix

Published: 5/25/2018

Updated: 4/15/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

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

CVSS v3

Risk Factor: Medium

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: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:xen, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/25/2018

Vulnerability Publication Date: 5/22/2018

Reference Information

CVE: CVE-2018-3639

DSA: 4210