FreeBSD : xen-tools -- PCI MSI mask bits inadvertently exposed to guests (4db8a0f4-27e9-11e5-a4a5-002590263bf5)

High Nessus Plugin ID 84700


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


The Xen Project reports :

The mask bits optionally available in the PCI MSI capability structure are used by the hypervisor to occasionally suppress interrupt delivery. Unprivileged guests were, however, nevertheless allowed direct control of these bits.

Interrupts may be observed by Xen at unexpected times, which may lead to a host crash and therefore a Denial of Service.


Update the affected package.

See Also

Plugin Details

Severity: High

ID: 84700

File Name: freebsd_pkg_4db8a0f427e911e5a4a5002590263bf5.nasl

Version: $Revision: 2.1 $

Type: local

Published: 2015/07/14

Modified: 2015/07/14

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.8

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

Vulnerability Information

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

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

Patch Publication Date: 2015/07/11

Vulnerability Publication Date: 2015/06/02

Reference Information

CVE: CVE-2015-4104