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FreeBSD : xen-kernel -- VMX: intercept issue with INVLPG on non-canonical address (80adc394-ddaf-11e5-b2bd-002590263bf5)

medium Nessus Plugin ID 89012

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Synopsis

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

Description

The Xen Project reports :

While INVLPG does not cause a General Protection Fault when used on a non-canonical address, INVVPID in its 'individual address' variant, which is used to back the intercepted INVLPG in certain cases, fails in such cases. Failure of INVVPID results in a hypervisor bug check.

A malicious guest can crash the host, leading to a Denial of Service.

Solution

Update the affected package.

See Also

http://xenbits.xen.org/xsa/advisory-168.html

http://www.nessus.org/u?3ac8bff4

Plugin Details

Severity: Medium

ID: 89012

File Name: freebsd_pkg_80adc394ddaf11e5b2bd002590263bf5.nasl

Version: 2.4

Type: local

Published: 2/29/2016

Updated: 1/4/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.7

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

CVSS v3

Risk Factor: Medium

Base Score: 6.3

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:xen-kernel, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2/28/2016

Vulnerability Publication Date: 1/20/2016

Reference Information

CVE: CVE-2016-1571