CVE-2016-9386 Information

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.

CVSS Vector

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

Reference

http://www.securityfocus.com/bid/94471 http://www.securitytracker.com/id/1037340 http://xenbits.xen.org/xsa/advisory-191.html https://security.gentoo.org/glsa/201612-56 https://support.citrix.com/article/CTX218775

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8