Xen Project INVPCID with Non-Canonical Addresses DoS (XSA-279)

Medium Nessus Plugin ID 119659

Synopsis

The remote Xen hypervisor installation is missing a security update.

Description

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a guest-to-host denial of service vulnerability. An attacker located on a guest virtual machine may be able to exploit this vulnerability to affect the availability of the host system. Only 64-bit PV guests are affected.

Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.

Solution

Apply the appropriate patch according to the vendor advisory.

See Also

https://xenbits.xen.org/xsa/advisory-279.html

https://xenbits.xen.org/gitweb/?p=xen.git;a=summary

Plugin Details

Severity: Medium

ID: 119659

File Name: xen_server_XSA-279.nasl

Version: 1.1

Type: local

Family: Misc.

Published: 2018/12/13

Updated: 2018/12/13

Dependencies: 78089

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2018-19965

CVSS v2.0

Base Score: 4.7

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

CVSS v3.0

Base Score: 7.1

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

Vulnerability Information

CPE: cpe:/o:xen:xen

Required KB Items: installed_sw/Xen Hypervisor, Settings/ParanoidReport

Patch Publication Date: 2018/11/20

Vulnerability Publication Date: 2018/11/20

Reference Information

CVE: CVE-2018-19965

BID: 106182

IAVB: 2018-B-0149