CVE-2016-9386

Severity CVSS v4.0:

Pending analysis

Type:

CWE-264 Permissions, Privileges, and Access Control

Publication date:

23/01/2017

Last modified:

20/04/2025

Description

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.

Impact

Vector 3.x

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

4.60

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:citrix:xenserver:6.0.2:::::::*
cpe:2.3:a:citrix:xenserver:6.2.0:::::::*
cpe:2.3:a:citrix:xenserver:6.5:::::::*
cpe:2.3:a:citrix:xenserver:7.0:::::::*
cpe:2.3:o:xen:xen::::::::

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:citrix:xenserver:6.0.2:::::::*
cpe:2.3:a:citrix:xenserver:6.2.0:::::::*
cpe:2.3:a:citrix:xenserver:6.5:::::::*
cpe:2.3:a:citrix:xenserver:7.0:::::::*
cpe:2.3:o:xen:xen::::::::

CVE-2016-9386

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools