CVE-2016-6258

HIGH

Description

The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.

References

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

http://www.debian.org/security/2016/dsa-3633

http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

http://www.securityfocus.com/bid/92131

http://www.securitytracker.com/id/1036446

http://xenbits.xen.org/xsa/advisory-182.html

http://xenbits.xen.org/xsa/xsa182-4.5.patch

http://xenbits.xen.org/xsa/xsa182-4.6.patch

http://xenbits.xen.org/xsa/xsa182-unstable.patch

https://security.gentoo.org/glsa/201611-09

Details

Source: MITRE

Published: 2016-08-02

Updated: 2017-07-01

Type: CWE-284

Risk Information

CVSS v2.0

Base Score: 7.2

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

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 8.8

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

Impact Score: 6

Exploitability Score: 2

Severity: HIGH