FreeBSD : xen-kernel -- x86 PV guests may be able to mask interrupts (3ae078ca-c7eb-11e6-ae1b-002590263bf5)

medium Nessus Plugin ID 96058


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.


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


The Xen Project reports :

Certain PV guest kernel operations (page table writes in particular) need emulation, and use Xen's general x86 instruction emulator. This allows a malicious guest kernel which asynchronously modifies its instruction stream to effect the clearing of EFLAGS.IF from the state used to return to guest context.

A malicious guest kernel administrator can cause a host hang or crash, resulting in a Denial of Service.


Update the affected package.

See Also

Plugin Details

Severity: Medium

ID: 96058

File Name: freebsd_pkg_3ae078cac7eb11e6ae1b002590263bf5.nasl

Version: 3.8

Type: local

Published: 12/22/2016

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 4.9

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


Risk Factor: Medium

Base Score: 6

Vector: CVSS:3.0/AV:L/AC:L/PR:H/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: 12/22/2016

Vulnerability Publication Date: 12/21/2016

Reference Information

CVE: CVE-2016-10024