CVE-2016-9386

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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

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

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://support.citrix.com/article/CTX218775	Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-191.html	Patch Vendor Advisory
http://www.securitytracker.com/id/1037340	Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/94471	Third Party Advisory VDB Entry
https://security.gentoo.org/glsa/201612-56

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:citrix:xenserver:7.0:::::::*
	cpe:2.3:a:citrix:xenserver:6.2.0:::::::*
	cpe:2.3:a:citrix:xenserver:6.5:::::::*
	cpe:2.3:a:citrix:xenserver:6.0.2:::::::*

Configuration 2 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

Information

Published : 2017-01-23 13:59

Updated : 2017-06-30 18:30

NVD link : CVE-2016-9386

Mitre link : CVE-2016-9386

JSON object : View

CWE

CWE-264

Permissions, Privileges, and Access Controls

Products Affected

citrix

xenserver

xen

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7.8 /10