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FreeBSD : xen-kernel -- CPU lockup during exception delivery (2cabfbab-8bfb-11e5-bd18-002590263bf5)

medium Nessus Plugin ID 86877

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Synopsis

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

Description

The Xen Project reports :

A malicious HVM guest administrator can cause a denial of service.
Specifically, prevent use of a physical CPU for a significant, perhaps indefinite period. If a host watchdog (Xen or dom0) is in use, this can lead to a watchdog timeout and consequently a reboot of the host.
If another, innocent, guest, is configured with a watchdog, this issue can lead to a reboot of such a guest.

Solution

Update the affected package.

See Also

http://xenbits.xen.org/xsa/advisory-156.html

http://www.nessus.org/u?ace869c0

Plugin Details

Severity: Medium

ID: 86877

File Name: freebsd_pkg_2cabfbab8bfb11e5bd18002590263bf5.nasl

Version: 2.5

Type: local

Published: 11/16/2015

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 4.9

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

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: 11/16/2015

Vulnerability Publication Date: 11/10/2015

Reference Information

CVE: CVE-2015-5307, CVE-2015-8104