Debian DSA-4804-1 : xen - security update

high Nessus Plugin ID 143500
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

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

Solution

Upgrade the xen packages.

For the stable distribution (buster), these problems have been fixed in version 4.11.4+57-g41a822c392-1.

See Also

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

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

https://www.debian.org/security/2020/dsa-4804

Plugin Details

Severity: High

ID: 143500

File Name: debian_DSA-4804.nasl

Version: 1.2

Type: local

Agent: unix

Published: 12/7/2020

Updated: 12/9/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-27672

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

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

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/4/2020

Vulnerability Publication Date: 10/22/2020

Reference Information

CVE: CVE-2020-27670, CVE-2020-27671, CVE-2020-27672, CVE-2020-27674, CVE-2020-28368

DSA: 4804