Debian DSA-4602-1 : xen - security update (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)

High Nessus Plugin ID 132875

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VPR Score: 8.1

Synopsis

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

Description

Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, guest-to-host privilege escalation or information leaks.

In addition this update provides mitigations for the 'TSX Asynchronous Abort'speculative side channel attack. For additional information please refer to https://xenbits.xen.org/xsa/advisory-305.html

Solution

Upgrade the xen packages.

For the oldstable distribution (stretch), these problems have been fixed in version 4.8.5.final+shim4.10.4-1+deb9u12. Note that this will be the last security update for Xen in the oldstable distribution;
upstream support for the 4.8.x branch ended by the end of December 2019. If you rely on security support for your Xen installation an update to the stable distribution (buster) is recommended.

For the stable distribution (buster), these problems have been fixed in version 4.11.3+24-g14b62ab3e5-1~deb10u1.

See Also

https://xenbits.xen.org/xsa/advisory-305.html

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

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

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

https://www.debian.org/security/2020/dsa-4602

Plugin Details

Severity: High

ID: 132875

File Name: debian_DSA-4602.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2020/01/15

Updated: 2020/07/10

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 8.1

CVSS v2.0

Base Score: 9.3

Temporal Score: 6.9

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:xen, cpe:/o:debian:debian_linux:10.0, cpe:/o:debian:debian_linux:9.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/01/13

Vulnerability Publication Date: 2019/05/30

Reference Information

CVE: CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-12207, CVE-2019-11091, CVE-2019-11135, CVE-2019-17340, CVE-2019-17341, CVE-2019-17342, CVE-2019-17343, CVE-2019-17344, CVE-2019-17345, CVE-2019-17346, CVE-2019-17347, CVE-2019-17348, CVE-2019-17349, CVE-2019-17350, CVE-2019-18420, CVE-2019-18421, CVE-2019-18422, CVE-2019-18423, CVE-2019-18424, CVE-2019-18425, CVE-2019-19577, CVE-2019-19578, CVE-2019-19579, CVE-2019-19580, CVE-2019-19581, CVE-2019-19582, CVE-2019-19583

DSA: 4602

IAVB: 2019-B-0091-S