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Debian DSA-4274-1 : xen - security update (Foreshadow)

medium Nessus Plugin ID 111797

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Synopsis

The remote Debian host is missing a security-related update.

Description

This update provides mitigations for the 'L1 Terminal Fault'vulnerability affecting a range of Intel CPUs.

For additional information please refer to https://xenbits.xen.org/xsa/advisory-273.html. The microcode updates mentioned there are not yet available in a form distributable by Debian.

In addition two denial of service vulnerabilities have been fixed (XSA-268 and XSA-269).

Solution

Upgrade the xen packages.

For the stable distribution (stretch), these problems have been fixed in version 4.8.4+xsa273+shim4.10.1+xsa273-1+deb9u10.

See Also

https://xenbits.xen.org/xsa/advisory-273.html

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

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

https://www.debian.org/security/2018/dsa-4274

Plugin Details

Severity: Medium

ID: 111797

File Name: debian_DSA-4274.nasl

Version: 1.5

Type: local

Agent: unix

Published: 8/17/2018

Updated: 11/13/2018

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.7

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

CVSS v3

Risk Factor: Medium

Base Score: 5.6

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

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

Patch Publication Date: 8/16/2018

Reference Information

CVE: CVE-2018-3620, CVE-2018-3646

DSA: 4274