CVE-2016-6259

MEDIUM

Description

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.

References

http://support.citrix.com/article/CTX214954

http://www.securityfocus.com/bid/92130

http://www.securitytracker.com/id/1036447

http://xenbits.xen.org/xsa/advisory-183.html

http://xenbits.xen.org/xsa/xsa183-4.6.patch

http://xenbits.xen.org/xsa/xsa183-unstable.patch

Details

Source: MITRE

Published: 2016-08-02

Updated: 2016-08-04

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 4.9

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

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 6.2

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

Impact Score: 3.6

Exploitability Score: 2.5

Severity: MEDIUM