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Debian DLA-1270-1 : xen security update

critical Nessus Plugin ID 106633

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Synopsis

The remote Debian host is missing a security update.

Description

Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in privilege escalation.

For Debian 7 'Wheezy', these problems have been fixed in version 4.1.6.lts1-12.

We recommend that you upgrade your xen packages.

Please note that CVE-2017-15590 (XSA-237) will *not* be fixed in wheezy as the patches are too intrusive to backport. The vulnerability can be mitigated by not passing through physical devices to untrusted guests. More information can be found on https://xenbits.xen.org/xsa/advisory-237.html

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html

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

https://xenbits.xen.org/xsa/advisory-237.html

Plugin Details

Severity: Critical

ID: 106633

File Name: debian_DLA-1270.nasl

Version: 3.9

Type: local

Agent: unix

Published: 2/7/2018

Updated: 6/3/2021

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

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

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: p-cpe:/a:debian:debian_linux:libxen-4.1, p-cpe:/a:debian:debian_linux:libxen-dev, p-cpe:/a:debian:debian_linux:libxen-ocaml, p-cpe:/a:debian:debian_linux:libxen-ocaml-dev, p-cpe:/a:debian:debian_linux:libxenstore3.0, p-cpe:/a:debian:debian_linux:xen-docs-4.1, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.1-amd64, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.1-i386, p-cpe:/a:debian:debian_linux:xen-system-amd64, p-cpe:/a:debian:debian_linux:xen-system-i386, p-cpe:/a:debian:debian_linux:xen-utils-4.1, p-cpe:/a:debian:debian_linux:xen-utils-common, p-cpe:/a:debian:debian_linux:xenstore-utils, cpe:/o:debian:debian_linux:7.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/6/2018

Reference Information

CVE: CVE-2016-9603, CVE-2016-9637, CVE-2017-2620

IAVB: 2017-B-0024-S